Security Cameras Systems

Female Adaptor Connectors

Video Adaptor: RCA Female to S-Video Male $6.59 Video Adaptor: RCA Female to S-Video Male

Hosa Gender Changer XLR Female to Female Adaptor $7.95 The Hosa GXX145 adaptor is designed to change an XLR output into an XLR input. The GXX145 features a female XLR on both ends.Â

Chimney 23598 Proflex Adaptor Female To Female $27.89 Femalefemale adaptor to join ProFlex Rods to a .375in brush.

American DJ 3-Pin Male - Female XLR Connectors $6.99 American DJ 3-Pin Male - Female XLR Connectors

TONGWEI METAL 23598 Female To .38 in. Pt Female Adaptor $28.96 Female To 3/8 Pt Female Adaptor. Manufactured to the Highest Quality Available. Design is stylish and innovative. Satisfaction Ensured.

LOREX ACC1511 Power Adaptor Accessory pack with 4 6-PIN DIN to BNC Adaptor $35.99 Type: Power Adapter Specifications: AC Adaptor: 100~240Vac 12Vdc 2000mA Cable Connector: 6 pin mini DIN female to BNC male, RCA male, power barrel female Features: Connects any Lorex camera with 6-PIN DIN output to any DVR or Observation System with BNC connectors. 4-in1 power adaptor provides power to 4 Surveillance cameras. Includes: 1 x 12V 2A Adaptor, 4 x DIN to BNC Adaptors Parts: 1 year limited Labor: 1 year limited

Luer Lock Connectors: Aluminum, Female $13.77 Luer Lock Connectors: Aluminum, Female Product Description Coming Soon.Product photo may not exactly match the product offered for sale. Please refer to the product description.

American DJ 5-Pin Male - Female XLR Connectors $6.99 5-pin DMX connectors--one male, one female--with gold pins.

American Dj 3-Pin Male - Female Xlr Connectors $6.99 3-pin DMX connectors--one male, one female--with gold pins.

American Dj 5-Pin Male - Female Xlr Connectors $6.99 5-pin DMX connectors--one male, one female--with gold pins.

TONGWEI METAL 23599 Male To .38 in. Female Adaptor $30.04 Male To 3/8 Female Adaptor. Manufactured to the Highest Quality Available. Design is stylish and innovative. Satisfaction Ensured.

Adaptor Female 3/8 Bps $15.94 Adaptor Female 3/8" Bps The use of Whale Quick Connect fittings produces a high integrity, reliable plumbing system specifically designed for mobile applications. Fittings and tubing design ensures easy installation and re-usability of components. Easy to use; just cut tubing to length and insert into fitting to the second stop. Remove by pushing in on the collet and pulling the tubing out. Unique Double Gripper design provides secure lifelong tube retention even at excessive pressures Collet has internal support ring ensuring O-ring seal is held in position and does not distort or leak under pressure The innovative, tube supporting, cage collet design eliminates leaks where fittings are close to tight bends High integrity single piece molding improves the reliability and strength of fittings Outer sleeve incorporates collet cover, thus preventing accidental tube release No collet clips are necessary, thus the Whale system reduces costs and installation time Whales semi-rigid polyethylene tubing offers the integrity of metal tubing with the usability of plastic Minimum recommended tubing bend radius is 7; minimum bend is 5 times outside diameter of tubing (approx. 4 1/2 for 15mm tubing) System is rated at 180 PSI at 68F and 90 PSI at 150F

Adaptor-Female 3/4Bps $7.96 Adaptor-Female 3/4"Bps The use of Whale Quick Connect fittings produces a high integrity, reliable plumbing system specifically designed for mobile applications. Fittings and tubing design ensures easy installation and re-usability of components. Easy to use; just cut tubing to length and insert into fitting to the second stop. Remove by pushing in on the collet and pulling the tubing out. Unique Double Gripper design provides secure lifelong tube retention even at excessive pressures Collet has internal support ring ensuring O-ring seal is held in position and does not distort or leak under pressure The innovative, tube supporting, cage collet design eliminates leaks where fittings are close to tight bends High integrity single piece molding improves the reliability and strength of fittings Outer sleeve incorporates collet cover, thus preventing accidental tube release No collet clips are necessary, thus the Whale system reduces costs and installation time Whales semi-rigid polyethylene tubing offers the integrity of metal tubing with the usability of plastic Minimum recommended tubing bend radius is 7; minimum bend is 5 times outside diameter of tubing (approx. 4 1/2 for 15mm tubing) System is rated at 180 PSI at 68F and 90 PSI at 150F

Adaptor Female 1/2Bsp $3.74 Adaptor Female 1/2"Bsp The use of Whale Quick Connect fittings produces a high integrity, reliable plumbing system specifically designed for mobile applications. Fittings and tubing design ensures easy installation and re-usability of components. Easy to use; just cut tubing to length and insert into fitting to the second stop. Remove by pushing in on the collet and pulling the tubing out. Unique Double Gripper design provides secure lifelong tube retention even at excessive pressures Collet has internal support ring ensuring O-ring seal is held in position and does not distort or leak under pressure The innovative, tube supporting, cage collet design eliminates leaks where fittings are close to tight bends High integrity single piece molding improves the reliability and strength of fittings Outer sleeve incorporates collet cover, thus preventing accidental tube release No collet clips are necessary, thus the Whale system reduces costs and installation time Whales semi-rigid polyethylene tubing offers the integrity of metal tubing with the usability of plastic Minimum recommended tubing bend radius is 7; minimum bend is 5 times outside diameter of tubing (approx. 4 1/2 for 15mm tubing) System is rated at 180 PSI at 68F and 90 PSI at 150F

DB25 MALE TO RJ45 FEMALE ACCSSERIAL/TERMINAL MODULAR ADAPTOR $1.7 DB25 MALE TO RJ45 FEMALE ACCSSERIAL/TERMINAL MODULAR ADAPTOR QVS DB25 MALE TO RJ45 FEMALE ACCSSERIAL/TERMINAL MODULAR ADAPTOR

MIRROR ADAPTOR MALE SCREW 8MM / FEMALE SCREW 10MM $10 Mirror adaptor (male screw = ..

DIV24 with 5 Female to VGA Female adaptor $2.07 Overview:DIV24 with 5 Female to VGA Female adaptorWhite colorSpecification:1.57in 1.57in 0.63in1.08oz

Wilson Electronics 859926 10 dB Attenuator with N Female Connectors $29.67 10 dB Attenuator with N Female Connectors

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Coax Female to F-Type Connector Adaptor

HIGH DEFINITION VIDEO CABLE

Nowhere has cable manufacturing made greater strides in manufacturing consistency and quality than in digital video coaxial cable.  It is safe to say that 20 years ago, these cables would have been impossible to make.  The technology didn't exist to make them!

                 

This, in a nutshell, is why older analog cables cannot effectively carry digital signals.  Analog cables lack almost every requirement to carry digital signals.  Table 1 is a short list of what you should expect from a digital cable.

 

CABLE PARAMETER

REQUIRED FOR DIGITAL

ANALOG CABLE PERFORMANCE

Resistance

High-purity, larger size.

High-purity, size not critical.

Bandwidth

HD is 1.5 GHz, 1080p/50 is 3 GHz.

Analog PAL is 5 MHz.

Skin Effect

Huge percentage of signal on skin.

Tiny percentage runs on skin.

Impedance

75 ohm

75 ohm

Impedance Tolerance

+/- 3 ohms or better

+/- 7 ohms or worse

Velocity

83%

66%

Return Loss

-21 dB to 4.5 GHz

Unspecified

"Safe" Distance RG-6

HD:  111m.  1080p/50: 76m

Kilometer (based on EQ recovery)

 

Table 1

 

There are simple things like the bandwidth.  Today's HD-SDI bandwidth (1.5 GHz) is 300 times the bandwidth of the analog signal (5 MHz).  It is extremely unlikely that any analog cable (much less connector, patch panel or other device) has been tested anywhere near the correct digital bandwidth, or are close to 75 ohms at those frequencies..

 

A huge percentage of the digital signal will travel on the skin of the conductor, so a lot of time is spent making sure that this conductor has a mirror finish on the outside. No such preparation is done for the analog cable.

 

The insulation ("dielectric") around the conductor affects the attenuation, even at moderately high frequencies.  The loss on foamed (digital) cable can be more than 3 dB better at 1 GHz compared to solid plastic (analog) cable.  At the third harmonic of the occupied bandwidth (2.25 GHz for HD, 4.5 GHz for 1080p/50), analog cables are rarely tested up there, so their performance is unknown.   

 

However, it should be stressed that these distance are "safe" distances, based on a SMPTE formula. This formula can be found in the SMPTE 292M standard for high-definition video.  The formula says that, when the signal strength has dropped by 20 dB at half the clock, then that is as far as a cable can "safely" go.  The clock for HD is 1.5 GHz, so half of that (750 MHz) is the same as the occupied bandwidth of the video signal, often called the "Nyquist Limit".  Many box and chip manufacturers say that they can go much farther than these ‘safe' numbers.  With modern top-of-the-line chips, you can often double these distances.  This simply proves that the ‘safe' distances are intended where you are using older equipment, or chips that are not top-of-the-line.  Then these distances might be more realistic.

 

Table 2 shows a list of common cables, with the distance they can go for HD and 1080p/50 signals.

 

Data Rate:

1.5 Gb/s

3.0Gb/s

Spec:

SMPTE 292M

SMPTE 424M

Cable Part Number

HD-SDI

1080p/50

 

Ft.

m

Ft.

m

179DT

109

33

76

23

1855A*

209

64

154

47

1855P

190

58

127

39

1505A*

308

94

215

66

1505F

225

69

150

46

1506A*

267

81

91

28

1694A*

364

111

250

76

1694F

286

87

192

59

1695A

323

98

217

66

7731A

546

166

364

111

7732A

427

130

289

88

7732LL

515

157

354

108

*Bundled versions of individual cable follow the same distance formulas.

 

Table 2

 

Once you pass these safe distances, what can you do?  The first option is to test the signal. This can be done in a number of ways. You can look at eye patterns, for instance.  The problem is that eye patterns are not as accurate as many designers and installers think.  For instance, there maybe a completely closed eye in the analyzer and yet EQ'ing and reclocking will bring back a robust and completely useable signal.

 

The reason for this is that the clock recovery in the test equipment is not the same as the clock recovery in actual broadcast gear.  In the test equipment clock recovery must work at a huge range of frequencies.  In broadcast equipment, it only needs to recover one clock frequency (or perhaps two).  Therefore, the clock recovery in HD or 1080p/50 equipment can be much more accurate, and allow longer cable runs, than any test gear might tell you.

 

 

The point is that there is a digital cliff, when the bit errors increase so rapidly that the signal can go from fully acceptable to unplayable in only a few feet of cable.  Wherever that "digital cliff" is, the wise thing is to stay away from it.  The only question is, how far away from the cliff do you want to be?  10 meters?  20 meters?  50 meters?  And perhaps this is a paranoia question rather than a technical question.

 

A simple, and perhaps more accurate test, is to put an HD signal on each cable, and plug the other end into an HD monitor.   Good HD monitor can shift the image area to the side so you are looking at the black retrace area between frames.  Any bit errors (ones that have been incorrectly read as zeros, or vice versa) will be very apparent on this part of a monitor.  The black area will flash white!

 

Now we take that paranoia number – the distance you want to stay away from the digital cliff.  Let's say you chose 20 meters for this example.  Obtain a 20 meter piece of cable of the same type used in your installation.  Put connectors on each end and, at one end, put a feedthrough (female-to-female) adaptor.  Be sure that the connectors and the feedthrough are good out to the bandwidth of HD signal (at least 2.25 GHz for HD, and as high as you can find – ideally 4.5 GHz – for 1080p/50).

 

Now put this extension cable in the circuit you are testing. It doesn't matter if it's added at the source or destination.  You're just making that cable 20 meters longer. Now look at the black retrace area.  If you see nothing, no white speckles, then you are at least 20 meters away from the cliff!

 

If you do see speckles, check the connectors and all the passive devices you are going through (patch panels, patch cords, adaptors, bulkheads, feedthroughs) and make sure they are 75 ohms through the bandwidth of the HD signal.  If everything checks out, then either the cable is too small (change to a larger cable) or you are going too far.  You can move the equipment in the racks or, the ultimate fix, change to fiber optic cable. Fiber is an expensive option but, if you have very long runs, certainly more than 300 metres, that is pretty close to the limit of copper cables, even with the best chips.

 

About the Author

Steve Lampen has been with Belden for 19 years and currently is Multimedia Technology Manager and Product Line Manager for Entertainment Products.  He has an FCC Lifetime General License (formerly an FCC First Phone License) and is a BICSI Registered Communications Distribution Designer. His latest book "The Audio-Video Cable Installer's Pocket Guide" is published by McGraw-Hill.

Visit our web site www.beldenapac.com or email us at info@beldenapac.com