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2455 Composite MTS/BTSC Subcarrier System |
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| The 2455 Composite Subcarrier System provides a transparent path for MTS/BTSC composite signals over a video microwave system with low distortion and flat frequency response from 20 Hz to 120 kHz. Frequency is crystal controlled and specified at the time of order from 5.4 MHz to 8.5 MHz. Connection to video is via a high impedance resistor which does not load the video signal even when power is lost. | ||
Equipment Specifications*
| System | |
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Frequency range Frequency response Distortion Emphasis Channel spacing (min) |
5.4 to 8.5 MHz,
crystal controlled, factory set ±0.2dB from 20Hz - 70kHz; ±0.5dB from 70-120 kHz < 0.3% at 1kHz (De-emph, 30kHz BW) None 600kHz |
| Modulator Characteristics | |
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Subcarrier output level Output Impedance Deviation (1Vrms in) Composite Impedance In Indications Alarm Connectors |
25 to 250 mVpp
(adj.) Bridging (>1.5k ohms) to 75 ohm line ± 150kHz 600 ohms balanced or 300 ohms single-ended Alarm, Peak Modulation PLL out of lock BNC, female; terminal strip for audio and alarm |
| Demodulator Characteristics | |
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Subcarrier input level Input Impedance Composite output level Composite Impedance Out Indications Alarm Connectors |
25 to 250 mVpp Bridging (>1.5k ohms) to 75 ohm line 1.0Vrms for ± 150kHz (composite) 600 ohms balanced or 300 ohms single-ended Alarm, Audio presence indicator Input subcarrier level low BNC, female; terminal strip for audio and alarm |
| Other | |
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Size Power |
1.75"H X 19"W X
15"D 115 VAC, 60Hz, <20W |
*+10 to +40 degrees C; Specifications subject to change without notice