Rolls HR78 - MANUAL 2 Quick Start Operation Manual

AM LOOP ANTENNA
- Connect the cord of the accessory AM loop antenna to the AM LOOP 300 Ohm termi-
nals. When tuning in AM stations, move the antenna to the left or right and set in the direc-
tion which yields the optimum reception.
• Do not place the power cord or speaker cords near the loop antenna. Interference or
noise may be generated.
Multi path refl ections
FM waves, like light waves, travel in a straight direction unless refl ected off objects in their
path. Because of this, two sets of waves reach your antenna from the FM station; those
that have traveled directly to the antenna, and those that have been refl ected off build-
ings or mountains. When the antenna receives both kinds of signals, the two interfere with
each other and result in distorted sound and poor separation. This phenomenon is called
"multi path refl ection". To reduce this problem, select an antenna with good directivity and
place it in the best location with strong reception.
PROGRAMMING PRESETS
Select the AM or FM band you wish to program (AM, or FM 1 or 2). Using the
TUNING +, or TUNING - buttons - select the station you wish to program. To
store that station in a preset (1 - 6), press the MEMORY button followed by the
Preset Number button you want that station stored to. Then press the memory
button once again to store the preset.
You may repeat this process for all 12 FM presets, and 6 AM presets.
SCHEMATIC
To view the HR78 schematic, visit our web site at www.rolls.com. Find the HR78
page, and download the online Owners Manual.
www.rolls.com
Rolls Corporation
Salt Lake City, UT
01/10
HR78
AM/FM Digital Tuner
FM
Intermediate Frequency:
Tuning Range:
30 dB quieting sensitivity:
IF Rejection 87.9 MHz:
Image Rejection 105.9 MHz:
3dB Limiting Sensitivity:
THD 1 mV Input:
Auto Tuning Sensitivity 97.9 MHz:
AM Suppression:
AM
Intermediate Frequency:
Tuning Range: US:
20 dB quieting sensitivity:
IF Rejection 603 kHz:
Image Rejection 1404 kHz:
Auto Tuning Sensitivity 999 kHz:
Max Output @ 1 kHz:
Supply Voltage:
Dimensions:
Weight:
QUICK START OPERATION GUIDE
SPECIFICATIONS
10.7 MHz +/- 0.3
87.5 - 108 MHz
28 dB
50 - 56 dB
20 - 26 dB
28 - 35 dB
0.5 - 2 %
25 - 30 dB
26 - 32 dB
450 kHz +/- 5
520 - 1710 kHz
58 dB
25 - 32 dB
32 - 38 dB
28 - 35 dB
0.5V +/- 0.05V
12 VDC, 700 mA
(Rolls Model PSU115)
(190w x 185d x 42.5h) mm
3 lbs