The Model HDM-1, frequency agile demodulator, has been designed to receive and demodulate all UHF, VHF, and CATV channels to baseband audio, video and composite signals. The HDM-1 uses a microprocessor driven PLL synthesized tuning circuit to assure precise tuning and accuracy. The micro-processor controls all functions and provides for easy channel selection using front panel channel up/down buttons and a large LED display.

Features
. Low Distortion Demodulation
. Agile Input: UHF, VHF, CATV
. SAW Filtered
. Adjustable Audio & Video Outputs
. Microprocr Controlled PLL Tuning
. Front Panel L.E.D. Channel Display
. 4.5 MHz Composite Output
(Microwave + BTSC Stereo Applications)

The HM-55 is an adjacent channel audio/video modulator specifically designed for head-ends requiring proven performance. The HM55‘s internal filters provide sharp VSB reduction for adjacent channel operation while maintaining similar C/N and video response found in more expensive SAW modulators.

Features
. E High 55 dBmV Output
. Available in Channels T8-T14, 2-36
. Adjacent Channel Performance (Except Sub)
. High VSB Attention
. Spurious Harmonics -60 dB
. Low Out-Of-Band Noise
. Crystal Controlled Frequency
. Complies with FCC Offsets & Accuracy Requirements
. Auxiliary AC Outlet
. Ten Years of Proven Reliability

GENERAL
Power Requirements 117 VAC, 60 Hz, 7W
Operating Temperature Range 0º to 50º Celsius
Dimensions 19"W x 1.75"H x 3"D
Weight 4 lbs.
Connectors F-Type

VIDEO
Minimum Input Level 0.5V p-p for 87.5% Mod.
Flatness ±1.5 dB, 30 Hz to 4.2 MHz
Modulation Range 60–95% (Adjustable)
Input Impedance 75 Ohms
Differential Phase 2º
Differential Gain 3%

AUDIO
Input Level 400mV p-p for ±25 kHz Dev
Aural Frequency 4.5 MHz ± 1.5 kHz (Above Video)
Distortion Less Than 1.5%
Input Impedance 600 Ohms Unbalanced
Flatness ±1 dB (50 Hz to 15 kHz)


Mounting 19" EIA Rack
Auxiliary Outlet 117 VAC, 600W
Front Panel Controls Output, Aural Carrier, Video
Modulation & Audio Deviation
Test Port –20 dB

The HMA-500 and the HMA-500H are high quality SAW filtered, frequency agile modulators specifically designed to meet the highest CATV performance standards.
All channels from 2-78 are easily selected by front panel switches and verified by an easy-to-read LED channel display. The modulators feature an extremely low out-of-band noise level allowing their use in larger channel head ends. The user-friendly front panel controls make the HMA-500 and the HMA-500H the ideal choice for any system where performance, reliability, and affordability are required.

Features
. 50 or 60 dBmV Output Models
. Low Out-Of-Band Noise
. SAW Filtered
. Easy to Read LED Channel Display
. Overmodulation Indicators
. Crystal Referenced PLL Tuning
. Switching Power Supply
(Operates from 90–260VAC)
. BTSC Stereo Compatible
(Built-in Encoder Available)
. I.F. Loop

STEREO ENCODER
MODEL OPT-1
Audio Input . . . . . . . . . . . . . . . . . . 10K ohm
Input Level . . . . . . . . . . . . . . . . . .5–1.5V p-p
Output . . . . . . . . . . . . . BTSC to Mod Input
Encoded Stereo Separation . . . . 20 dB Min
Frequency Response . . . . . . 50Hz – 13 kHz
Distortion . . . . . . . . . .. . . . . . . . . . . . . . . . 1%

RF
Output Channels Chs 2-78, 98, 99 (54-550 MHz)
FCC Offsets ±12.5 kHz and ±25 kHz (Selectable)
Output Level HMA-500: 50 dBmV, HMA-500H: 60 dBmV
Output Range 15 dB (Adjustable)
A /V Ratio -5 to -20 dB (Adj)
Visual Carrier Stability ±5 kHz (Meets FCC Docket 21006)
Aural Carrier Frequency 4.5 MHz ±1 kHz
Spurious Outputs -60 dBc
C/N (In-Channel) 65 dBc
Out-Of-Band Noise -75 dBc (4 MHz Bandwidth)

VIDEO
Minimum Video Input .5V p-p for 87.5% Modulation
Frequency Response ±1 dB (50 Hz to 4.2 MHz)
Video C/N 60 dB
Hum and Noise -60 dB
Differential Phase 1.5º
Differential Gain 1.5% Typical
Group Delay 75 nsec

AUDIO
Minimum Audio Input Level 200 mV RMS for 25 kHz Deviation
Input Impedance 10K Ohms
Frequency Response ±1dB 50 Hz to 15 kHz
Distortion (THD) 1% Maximum
BTSC Stereo Encoder Optional

GENERAL
Power Requirements 90-260 VAC 25W
Operating Temperature Range 0º to 50º Celsius
Dimensions 19"W x 1.75"H x 9"D
Weight 6 lbs.

The HP-40 and HP-60 frequency agile processors have been designed to convert any off-air or cable channel input to any
cable channel 2–78. All channel conversions are performed using simple front panel buttons and a large LED display indicating input and output channels. Frequency control is accomplished by a microprocessor controlled, PLL synthe-sized tuning circuit to assure accurate, stable operation. The HP-40 and HP-60 both use SAW filtered conversions to assure high out-of-band rejection, as well as a high reliability CATV hybrid output amplifier (HP-60) for low distortion and high output performance.

Features
. 50 & 60 dBmV Output Models
. Precise Signal Regulation
. Easy-to-Read Front Panel L.E.D.
Channel Display
. BTSC Stereo Compatible
. Switching Power Supply
(Operates From 90 to 260VAC)
. Dual SAW Filtering
. Adjacent Channel Performance

INPUT SECTION
Frequency Range Off-Air: 54-216, 470-890 MHz
Channels Cable 2-78
Selectivity -60 dB (Adj Ch)
Noise Figure 6 dB: VHF, 8 dB: UHF
Input Range -15 to +25 dB
Tuning PLL Synthesized

OUTPUT SECTION
Frequency Range 54–550 MHz (Chs 2-78)
FCC Offsets ±12.5/25 kHz (Selectable)
Output Levels HP-40: 50 dBmV, HP-60: 60 dBmV
Output Range 15 dB (Adjustable)
Accuracy/Stability ±5 kHz
A/V Ratio -9 to 20 dB (Adjustable)
I.F. Output 45 MHz, 35 dB
Flatness ±1 dB
Spurious Outputs -60 dBc
Return Loss 16 dB
C/N (In-Band) 60 dBc
Out-of-Band Noise -75 dBc (4 MHz Bandwidth)

GENERAL
Power Requirements 90–260 VAC 20 W
Operating Temperature Range 0º to 50º Celsius
Dimensions 19"W x 1.75"H x 9"D
Weight 6.5 lbs

The model HR-120 is a high quality, synthesized tuned commercial satellite receiver developed for world-wide application. Economically priced, the HR-120 has specialized features not found in comparable products. All tuning and functions are microprocessor controlled and available from the front panel.

Features
. C/Ku Band Operation
. Switching Power Supply
(Operates from 90-260VAC)
. Audio Dynamic Noise Reduction
. Dual Audio Subcarriers
. Adjustable Composite Output
. Digital Readout & Control of
All Functions
. Adjustable Threshold Reduction
(3 dB)
. Adjustable Video & Audio BW
. Selectable Video Deviation
. Selectable Audio De-Emphasis
. PLL Synthesized Tuning
. Front Panel Video Monitoring

RF
Input Frequency 950–2050 MHz
Input Level -60 to -30 dBm
I.F. BW 18/27 MHz (Selectable)
Threshold 6 dB to 3 dB (Adjustable)

VIDEO
Format NTSC, (CCIR REC 405-1)
Output Level 1V p-p
Frequency Response ±1dB (50Hz -4.2 MHz)
Differential Gain Less Than 5%
Differential Phase Less Than 5º
Composite Outputs 1–2V Variable (Flat or Filtered)
Polarity Standard or Inverted
Deviation High, Med, Low (Selectable)

AUDIO
Subcarriers: 2, (5-9MHz)
Frequency Response ±1dB (50Hz – 15kHz)
Output Level 2.2V p-p
Bandwidth 130/250/380/450kHz (Selectable)
De-emphasis 75 us, DNR
THD Less than 1%

GENERAL
Front Panel Controls Digital, LED Readout
Microprocessor Based
Power Requirements 90-260 VAC, 15W
Power to LNB 18 VDC, 350mA
Operating Temperature 0º to 50º Celsius
Dimensions 19"W x 1.75"H x 9"D
Weight 7.5 lbs (3.4Kg)