Rolls HR78 User manual
The ROLLS HR78 is a PLL synthesized digital AM/FM tuner in a feature-packed half-rack chassis. The unit is
ideal for replacing analog tuners, and where a small digital tuner is desired. The unit ships with FM and AM
antennas, and the 1/8" output has sufficient levels to drive a pair of headphones. Up to two HR78 units may be
rack mounted in a single standard 1U rack space, the Rolls URT5 Universal Rack Tray
FEATURES:
• Retains presets when power is off • 18 presets, 12 FM and 6 AM
• Large LCD digital display • Output Level control
• Auto search up and down • US or International frequency centers
• RCA and 1/8" (3.5 mm) Outputs • FM stereo or mono operation
SPECIFICATIONS
FM AM
Intermediate Frequency: 10.7 MHz +/- 0.3 Intermediate Frequency: 450 kHz +/- 5
Tuning Range: 87.5 - 108 MHz Tuning Range: US 520 - 1710 kHz
30 dB quieting sensitivity: 28 dB International 531 - 1602 kHz
IF Rejection 87.9 MHz: 50 - 56 dB 20 dB quieting sensitivity: 58 dB
Image Rejection 105.9 MHz: 20 - 26 dB IF Rejection 603 kHz: 25 - 32 dB
3dB Limiting Sensitivity: 28 - 35 dB Image Rejection 1404 kHz: 32 - 38 dB
THD 1 mV Input: 0.5 - 2 % Auto Tuning Sensitivity 999 kHz: 28 - 35 dB
Auto Tuning Sensitivity 97.9 MHz: 25 - 30 dB
AM Suppression: 26 - 32 dB
Max Output @ 1 kHz: 0.5V +/- 0.05V
Supply Voltage: 12-15 VDC, 700mA
Dimensions: (190w x 185d x 42.5h) mm
Weight: 3 lbs ROLLS Coporation
5968 South 350 West, Salt Lake City, UT, 84107
(801) 263-9053 FAX (801) 263-9068
HR78 Digital AM/FM Tuner
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