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Blonder Tongue CATV Channelized Audio/Video Modulator with SAW Filtering (Channel 43)

Blonder Tongue CATV Channelized Audio/Video Modulator with SAW Filtering (Channel 43)
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Blonder Tongue BAVM-860 Overview

The CATV Channelized Audio/Video Modulator, Channel 43, from Blonder Tongue is an all-solid-state audio/video modulator that provides a modulated visual and aural RF carrier output on one specific CATV channel. The unit modulates the audio and video inputs and provides the requested RF CATV channel output for use in a CATV, MATV or SMATV system. The modulator accepts standard (sync negative) polarity video at a 0.7-2.5V peak to peak level from sources such as a TV camera, video tape recorder, TV demodulator or satellite receiver.

The modulator features a +55dBmV RF output level, and an IF SAW filtering for adjacent channel operation. All aeronautical channels are offset positive with a tolerance of ±5kHz as required by FCC 21006. All level controls are located on the front panel. The RF level control provides up to +55dBmV output. The video modulator control sets the depth of modulation for 87.5% over an input video level range from 0.7VP/p to 2.5VP/p. An audio modulation control permits adjustment for ±25kHz peak deviation of the aural carrier.

Meets FCC docket 21006 aeronautical frequency offset requirements
Fully compatible with BTSC encoded stereo audio
Front panel accessible level controls for easy set-up and adjustments
AC outlet

Blonder Tongue BAVM-860 Specs

RF Specification
Frequency Range
CATV channel 43
Output Level
55 dBmV, minimum
Output Level Range
15 dB
Audio/Video Carrier Ratio Control
-7 dB to -20 dB
Frequency Tolerance
±10 kHz standard channels, ±5 kHz FCC 21006 offsets
Audio Carrier Frequency Setting
±1 kHz maximum, 4.5 MHz above video carrier
RF to Video Response
1 dB P/V from Fv -0.5 MHz to Fv +4.2 MHz
Broadband Noise
-90 dBc
Spurious Output
-60 dBc in 50 to 860 MHz Range @ +55 dBmV output
Output Match (Return Loss)
12 dBc
Vestigial Sideband Response
@ channel edge -20 dB, @ adjacent channel -40 dB
0.7 to 2.5 V peak to peak for 87.5% modulation
Input Return Loss
18 dB
Carrier-to-Noise Ratio
62 dB in 4 MHz bandwidth
Hum Ratio
60 dB peak to peak video to 60 Hz RMS
Differential Gain
5% at 87.5% modulation
Differential Phase
5° at 87.5% modulation
Group Delay
170 ±50 nS
Input Impedance
10 kΩ, unbalanced
140 mV RMS for 25 kHz peak deviation
Frequency Response
±1.0 dB (50 Hz - 15 kHz referent to standard 75 msec pre-emphasis)
Intercarrier Stability
4.5 MHz at ±5.0 kHz
Power Requirements
105 - 130 VAC, 60 Hz, 10.5 W
Temperature Range
0 to +50°C
Audio In
F-type female
Video In
F-type female
RF Output
F-type female
RF Output Test
F-type female -30 dB
AC Outlet
Female AC outlet 600 VA maximum
Line Cord
6' power cable: 3 wire grounded, 3 wire convenience outlet
19 x 1.75 x 3" (48.26 x 4.44 x 7.62 cm)
4 lb (1.8 kg)

Blonder Tongue BAVM-860 Reviews

See any errors on this page? Let us know


Is it compatible with current digital transmission standards? Can it transmit HD video?
Asked by: Ian C.
The Blonder Tongue CATV Channelized Audio/Video Modulator with SAW Filtering meets FCC docket 21006 aeronautical frequency offset requirements and is fully compatible with BTSC encoded stereo audio.
Answered by: Graham N.
Date published: 2018-08-26


which norm handles? pal-B/G pal-N or NTSC? thanks.
Asked by: Jorge d.
The Blonder Tongue CATV Channelized Audio/Video Modulator with SAW Filtering SAW is NTSC only.
Answered by: Dennis A L.
Date published: 2018-08-26


Is there a way to take the hdmi out from my computer and send it down the cable in my home. It looks like the Blonder Tongue CATV Channelized Audio/Video Modulator with SAW Filtering (Channels 37-94, 100-135) will send the signal down the cable but how can I get the hdmi in?
Asked by: Linus M.
HDMI won't go directly in; the modulator accepts standard video in. There are converters that will down sample and convert your hdmi to standard video.Note that the converter sends the video out through RCA connectors and the modulator accepts video in via f-type connectors. I used something like these (though they were in stock when I purchased them) -hth
Answered by: Eric M.
Date published: 2018-08-25
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