Product Overview
The AM60-860 is a professional quality agile audio/video modulator. It is equipped with the Emergency Alert System (EAS) feature, which can also be used as an alternate IF input. The unit provides an audio and video modulated RF carrier on any channel from 54 to 860 MHz. Any standard audio/video source can be used, such as satellite receivers, television cameras, video tape recorders, or television demodulators.
Channel tuning is easily accomplished with the use of front panel push button switches. Frequency plans including CATV Standard EIA, IRC, HRC & Broadcast are available in the 54-860 MHz frequency range. All channel frequency information with appropriate FCC offsets is pre-programmed and tuned electronically via microprocessor.
The unit has a wide range of standard and optional features that make it ideal for advanced CATV systems. 4.5 MHz aural input, and 600 Ohm balanced audio have been incorporated as standard equipment on the AM60-860. A stereo audio option, Option 05, allows the integration of a BTSC stereo encoder module. This optional stereo encoder converts stereo left and right audio into a composite BTSC stereo audio signal. The factory installed option provides 20 dB of stereo separation, less than 1.0% total harmonic distortion and 60 dB signal to noise ratio.
The AM60-860 meets FCC Docket 21006 aeronautical frequency offset requirements (+/-5 kHz video carrier accuracy). Outstanding in channel carrier to noise performance of 67 dB typical is achieved by the unit. A custom SAW IF filter is employed to provide true vestigial sideband selectivity with built-in FCC group delay equalization. A state of the art converter design with preprogrammed microprocessor controlled channel tuning @ 60 dBmV output ensures the Blonder Tongue AM60-860 is the ideal agile modulator for any demanding CATV headend need.
Features
- Supports All Broadcast and CATV Channels, Including All HRC and IRC Assignments
- EAS/ALT IF Ready Via Manual or Automatic Mode
- Superior Broadband Noise Performance (-76 dB)
- Fully Compatible with BTSC Encoded Stereo Audio
- All Level Controls are Conveniently Located on Front Panel for Easy Set Up and Adjustment
- Rack Mountable - 1 EIA (1.75") Rack Space
- UL Listed with Three Year Product Warranty
Specifications
- RF
- Frequency Range: 54-860 MHz
- Channels: CATV, VHF, UHF (STD,HRC,IRC)
- FCC Offset (pre-programmed): 0, +12.5, or 25 kHz
- Output Level - Min: +60 dBmV
- Output Level Range +50 to +60 dBmV (a)
- Aural/Visual Carrier Ratio: -15, ±5 dB
- Visual Carrier Frequency Tolerance
- Standard Channels: ±20 kHz (max, 0° to 50° C)
- FCC Aeronautical Channels: ±5 kHz (max, 0° to 50° C)
- 4.5 MHz Aural Intercarrier Frequency Tolerance: ±150 Hz (0° to 50° C)
- Channel Selectivity
- Adjacent Aural and Below: -40 dB
- Adjacent Picture and Above: -40 dB ±5 dB
- Spurious Outputs: -63 dBc
- C/N Ratio In-Channel: 63 dB (b)
- Broadband Noise: -77 dBc (b)
- Output Impedance: 75 Ω
- Output Return Loss: 12 dB
- IF
- Aural Frequency Standard: 41.25 MHz
- Visual Frequency Standard: 45.75 MHz
- Composite IF Loop Output
- Aural Carrier Level: +20 dBmV
- Visual Carrier Level: +35 dBmV
- Output/Input Impedance: 75 Ω
- Output Return Loss: 15 dB
- Input Return Loss: 16 dB
- EAS/ALT IF Input Level: 38 dBmV, @ 45.75 MHz
- EAS/ALT IF Switch Isolation: >60 dB
- Video
- Input Level: 1.0 V p-p (d)
- Frequency Response fv-0.5 MHz to fv+4.2 MHz: 1.5 dB P/V
- P-P Video to RMS Hum Ratio: 65 dB
- Video Signal-to-Noise Ratio,Weighted: 58 dB (b)
- Differential Gain: 2.0% (d)
- Differential Phase: 1.0° (d)
- C/L Delay Inequality: see note ns (c)
- Overmodulation Indicator: 87.5, ±2.5 %
- Input Impedance: 75 Ω
- Return Loss: 18 dB
- Audio
- Input Level: 180 mV RMS (e)
- Frequency Range: 20 Hz to 20 kHz
- Frequency Response: ±1.0 dB (f)
- Pre-Emphasis-Mono: 75 µs
- Audio Signal-to-Noise: 60 dB (e)
- Total Harmonic Distortion: 0.6% (g)
- Overmodulation Indicator: 25, ±2 kHz
- Input Impedance: 600 Ω, balanced
- General
- Power Requirements
- Voltage: 117, ±10% VAC
- Frequency: 60 Hz
- Power: 27 W (h)
- Fuse: 0.40 A
- Temperature Range: 0 to +50 °C
- Mechanical
- Dimensions (W x H x D): 19.0 x 1.75 x 14.25 in. (483 x 44 x 362 mm)
- Weight: 7 lbs., 3.18 kg
- Connectors
- Video Input
- Standard: "F" Female
- Option 02: BNC Video Input: BNC type, Female
- Audio Input: Barrier Strip
- IF Output: "F" Female
- IF Input: "F" Female
- RF Output: "F" Female
- EAS/ALT IF: "F" Female
- Controls
- Channel Selection: Push Button Switches
- Video Level: Control
- Aural Carrier Level: Control
- Audio Level: Control
- RF Output Level: Push Button Switches
- Mode: Push Button Switches
- Indicators
- Channel Display: 3 Digit LED, Red
- Video Overmodulation: LED, Red
- Audio Overmodulation: LED, Red
- EAS/ALT IF: LED, Red
- Stereo: LED, Green (Option)
