Tutor C-100 Signal Level Meter - AVS Forum
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post #1 of 8 Old 07-11-2011, 06:10 AM - Thread Starter
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post #2 of 8 Old 07-11-2011, 08:09 AM
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Great first post!

Post two more and then you can post a link.

In the meantime, why not ask a question (if you have one) and if you're patient, you may get a helpful response.
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post #3 of 8 Old 07-11-2011, 10:10 AM - Thread Starter
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I have a couple of questions about specs in the documentation on the manufacturer's website for the Tutor C-100 signal level meter I bought a new one off of eBay. They say it can read the levels of analog and QAM digital as well as OTA digital but here is the rub in the "datasheet" it lists the digital formats as QAM and QPSK. The user manual does not mention the digital formats it just says it measures digital channels by pushing the zero key to toggle between analog and digital. "Analog Channel Database CATV 2-136, VHF-UHF 2-69 (appear as 202-269)"

It is my understanding that OTA should be 8-VSB. I have used it with cable but I have not had the chance to use it with OTA so do you think it actually reads 8-VSB ?

Frequency Range: 46MHz - 870MHz
Accuracy: 50ppm (20ºC/68ºF)
Channel Type:
Analog TV: Video and Audio carriers
Digital TV: QAM, QPSK
FM channel: Single Frequency
Level Measurement:
Range: -35 dBmV to +60 dBmV
Accuracy:2dB (10°C to 30°C)
Resolution: 0.1dB
Trunk Voltage measurement:
Input range: 0-100VAC
Accuracy: 1.5V Resolution 0.1V
Audio Output: Built-in speaker
Dimensions: 142mm X 82mm X 35mm
Gross Weight: 0.9kg (1 lb)
Net Weight: 0.28kg (without batteries)
Display: 320 X 240 Color LCD with backlight
Power Supply:
Charger: AC 100V-240V/50Hz
Working Time: Continuous 2.5 hours (full
charge)
Charging Time: 4-6 hrs.
Batteries: 5 AA rechargeable =/>2500mAh
(batteries are included)
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post #4 of 8 Old 07-11-2011, 02:56 PM
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Digital OTA is 8VSB.

From their specs:
http://www.tektruk.com/Tutor-C-100-I...er-102-101.htm

Quote:


TUTOR METERS Model: C-100

Installer/Technician Signal Level Meter
46-870 MHz, -30 to +60 dBmV, resolution 0.1 dB
Single channel display shows Video, Audio
Dual channel display (TILT mode) displays 2 carrier levels
Built-in speaker for aural listening on audio carriers - TV and FM radio
Direct Channel Entry
Big easy to read backlit screen
Measure voltage on coax from 0-100 volts
Measures Analog TV CATV, VHF/UHF, and FM
Measures QAM, QPSK, 8VSB, DVB-T, and ISDB-T for reference measurements

Appendix 7.1.2 of the manual provides the frequency chart for OTA.
Link to manual:
http://www.tutormeters.com/manuals/t...100-manual.pdf

Just curious...
Why did you buy the meter?
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post #5 of 8 Old 07-12-2011, 11:14 PM - Thread Starter
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Ham radio operator and electronics hobbyist

I was given some information by a vender on eBay!

Also, use caution. The original TUTOR meter has been copied, but contains inferior software. It s NOT the TUTOR C-100, and does not have the capabilities of the TUTOR C-100. The TUTOR C-100 does NOT have a channel 1. Mine sounds like an actual Tutor C-100 meter.

helped a fellow ham re-cable his house. I wanted to measure the CATV levels to see if he would need an amp to do what he wanted to do. Add two more tv's to his system. When I first measured his levels at the ground block next to the circuit breaker panel ch2 was around 10dBmv and the upper channels were around 0dBmv. About 3 weeks later the cable co had cleaned up the levels they were all in the +10dBmv to +15dBmv (a neighbor had phone service installed)

About a week ago I started having trouble with my cable modem it was nice to be able to verify the signal level at the back of the modem we live at the end of a dead end street and have experienced low signal levels in the past.
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post #6 of 8 Old 07-13-2011, 06:49 AM
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Quote:
Originally Posted by dfargo5133 View Post

... it was nice to be able to verify the signal level at the back of the modem .

You can probably get diag/level info you need by logging into the cable modem:
http://192.168.100.1
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post #7 of 8 Old 11-01-2012, 04:43 PM
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I just got the Tutor Meters C-100 instrument as well. I'm using it to check the output of modulators in a cable headend. So far, I'm very pleased. It has helped me to adjust the RF output, and I am intending to use it for balancing the modulators and for balancing the audio/video outputs of each one.

One curious thing about it is that when I tried a voltage check, it registers no voltage (0.00) on the cable. I may be looking for the wrong detail or something, but that did seem unexpected.
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post #8 of 8 Old 11-01-2012, 11:22 PM
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Quote:
Originally Posted by Ratman View Post


You can probably get diag/level info you need by logging into the cable modem:
http://192.168.100.1
In fact, if you're interested in the upstream level that's about the only place you can easily read it...
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