GCoco

The HDD could be not supported/compatible with the DVR. Open the DVR and look for any identifying information on their circuit board and search the Internet. You may get lucky.

I can't speak to the SCW cameras. I do know Lorex is a subsidiary of Flir the thermal imaging company. Co-worker purchased a Lorex package from Sam's due to low price. The NVR sold in that package will only work with the high end Lorex cameras. So he quickly realized he got bambozzled.

I had a problem with a 7716 recognizing one of four 2132 turrets. Had to upgrade to the latest firmware which was 3.4.4 for that NVR. All cameras were recognized. If you have a Chinese NVR upgrading firmware is not an option.

I stand corrected. A 1.3mp bullet Hik from a US distributor is about $115. An equivalent analog Hik is around $56. I did not realized how much analog cameras dropped in price over the last few years. When I converted from analog to digital, the analogs were actually more than the digitals, although I was buying 1000TVL and most IR I could find in order to get a good video. Where I work there about 20 of us with camera systems and everyone that went analog wished they had gone digital once they see the comparison in video quality.

I was talking Hiks. The IPs are actually cheaper than the analogs

https://www.anixter.com/content/dam/Anixter/Guide/7H0011X0_W&C_Tech_Handbook_Sec_07.pdf See section 7.5 on the above link. Conductors used in overhead lines use a steel core for mechanical strength and not the conductors themselves. I have enjoyed this discussion, the purpose of which was to dispel the misconception stated in this thread that AC travels further than DC in wire. The toss is correct in his ascertain that for the purposes of this thread at 60Hz there is no difference. But only this thread. Look at section 7.10 for a given conductor the AC/DC resistance ratio at 400 and 800 Hz. You will see a large increase in resistance at these frequencies. So the statement a skin effect isn't a factor until you get to 500MHz is not factual. I stand by my previous statement that as the frequency or conductor size increases, so does the AC resistance. At 60Hz using small conductors AC = DC.

+1. You will quickly regret not going with Ip cameras, since they have much better resolution and in most instances cheaper than an analog for the same application

BTW I am a licensed professional electrical engineer with more than 34 years in the electric utility industry as a transmission and substation engineer.

For small conductors at low frequency (60Hz) you are correct. The higher the frequency the greater impact the skin effect has on the resistance regardless of the conductor size. As the conductor size increases, even at 60Hz, the skin effect has a larger and larger impact on the resistance. Skin effect is a very important consideration in the transmission and distribution of electricity due to the large diameter of the conductors. Skin effect is not important on small conductors since the skin effect is essentially non-existant due to the fact that the skin depth reaches to the center of the small diameter conductor, therefore AC = DC resistance.

https://www.123securityproducts.com/downloads/dl/file/id/10952/ds_7600_series_spec_sheet.pdf 4 in and 1 out

BTW 40 feet seems like a pretty short distance unless you are using an extremely small conductor. 18AWg wire has a resistance of 8 ohms/1000 feet. So a 50 foot run will have only (50+50)/1000 x 8 or 0.8 ohms resistance. For a 12VDC system, for every 12W of load, the voltage will drop 0.8V. Hikvision 2232 with IR on will draw 9W, and the camera is guaranteed to operate at 10.8V. So using an 18AWG conductor the camera will operate at a distance of 100 feet. Actually it is lkely more since power supplies typically put out more than 12V and a typical home AC voltage is at least 123V.

For small conductors the AC and DC resistance are the same. On large conductors the AC resistance is higher due to the skin effect which does not allow correct to flow in the center of the conductor. That is why power lines use multi conductor wire so as to increase the surface area. DC current can flow through the entire conductor so for a same size large conductor you will have less resistance with DC than AC. I am not discussing AC impedance (capacitance and inductance) since this does not become an issue over short distances. For household AC and low voltage DC applications the DC resistance can be used to calculate voltage drop and the voltage drop will be identical whether you are using AC or DC for a given voltage.

Look at the Hikvision 7608. Quick loop around shows you can get true English model without HDD for $350. They can handle (2) 4TB drives

Your FOV is too wide/tall. You need enough pixels to read the numbers/letters. If I remember correctly you need the letters to be at least 15 pixels tall to read. There are plenty of FOV calculators out there. Since LP numbers/letters are 2.5" tall (here in Louisiana) then you need approximately 75 pixels per vertical foot. A 2MP camera has 1920W x 1080H so your FOV can be no more than about 15 feet at the license plate location (1080/75). Obviously the greater the camera is from the car, the larger the lens needed. For example a 2MP camera with 1/3 inch sensor and 60 feet from the car would need a lens with a minimum focal length of 20mm. Also, make sure your IR will provide enough illumination without vehicle lights on or any other lights, that way someone trying to "sneak" in without lights, you can still read the LP. I actually had to set my shutter/exposure to 1/1000 and the camera is dedicated to LP reading in that I have another camera covering the broader area but it cannot get the resolution needed to read the LP.

The video will tend to be darker.

Try a shutter speed of 1/500 up to 1/1000. I have mine set so that with no other light but the IR you still capture the plate. However, you will lose vehicle detail, but if you have plate you got what you need.

You can use 1,000,000 A and it doesn't matter. The PS will only provide the power needed by the device being connected to it

If camera is 9W or less, then a 12W is more than enough. What am I missing?

As SK said 75 feet should not be a problem. Verify your power supply rating and compare to camera power consumption with IR on. I do not know what kind of cameras you have, but you need close to 1A or 12W power supply since Hiks typically draw 9W at night. If the power is rated more than the camera rating, swap this PS with another, it may just be bad. Also, you may have a bad cable/connector which in that case the problem will not go away. If swapping PSs that are rated high enough doesn't work, try running with a PS that plugs directly into camera. If problem goes away, replace your power cable.

Can you take the power supply from your current location and using extension cord power up camera 1? If not, eBay and Amazon sell a 12v plug in AC to DC power supply for less than $10. As far as camera power requirements, there should be a sticker somewhere on the camera that at least gives a model number. From there you can lookup specs.

Thanks SunnyKim. Forgot to mention to test at maximum power usage.

This my help --- http://www.cctvforum.com/viewtopic.php?t=25537

Update -- Hikvision tech called and rerquested NVR configuration file. He discovered under the HDD settings that CH12 was not set to record. Stupid me did not realize this was evern an option that I had obviously discovered earlier in setup. Anyway, kudos to Hikvision for their support. As far as CH2 not recording at times. This also started to hasppen on CH5 and CH9. To fix I went in and deleted all recording options and saved. The went in and setup the recordjing options and changed. It has bee almost two weeks now and everyhting is working fine. I am impressed with the 7716 NVR, the cameras, and their support. Waiting on devlivery of an outdoor Hikvision 4220 PTZ and the Huisun mini 10X PTZ. My setup -- DS-7716NI-SP/16 NVR with (4) 4TB WD purple HDDs (7) DS-2CD2332-I5 (4) DS-2CD2132F-I2 (1) DS-2CD2332-I2 I use as a LP reader on my driveway

I had a 7716 for about 2 months with all HiKvision cameras. Installed (4) 4TB hard drives and 11 cameras set for continuous record. All was good. Two weeks ago I installed a 12th camera and set up exactly the same as others. I keep getting a recording exception for CH12 and obviously that channel does not record. I swapped the cameras bewteen CH11 and CH12. Recording problem did not follow camera (stayed on CH12) Four days ago, I noticed CH2 still had the record symbol, but NVR said there no record files when I tried playback. I was only trying to playback that one channel. I lowered resolution on all the cameras just to check to see if it was bandwith issue, it wasn't. The NVR can handle 100Mbps and I am using less than 70Mbps. The NVR and cameras are not Chinese. NVR firmware was upgraded to latest 3.4.4 -- Hikvision's only recommendation. Anyone have any ideas? Thanks

If you have a power supply that is common to camera 1 and other cameras, disconnect the PS from the other cameras and see if camera 1 is working. If camera 1 is working now, the PS is too small to handle all the load and the camera with the longest run would be the first to see too low of voltage. If so add a bigger PS or another to power just camera 1. If there is no difference in camera 1, take a power supply to the camera 1 location and plug directly into the camera. This should work if the camera worked at the location of camera 2. I assume that camera 1 will begin working – so you have either a bad cable or way too long of a run. In either case – do one of the following: locate a PS at the camera location or replace the cable. How long is the cable run and how many watts (or mA) does the camera use?