Manley JUMBO SHRIMP - Manual (Page 16)

Remora Remote Features!
1. Remote transmitter and receiver operate under crystal-clocked microprocessor control for maximum signal
discrimination, flexibility, and system range.
2. The user may easily reprogram the user-number portion of the remote system’s serial I.D. data stream. This
will eliminate the possibility of undesired operation due to remote command collisions.
3. Multi-color LED displays battery condition when the transmitter is in use, as well as two-digit user-number
programming status when in program mode.
4. Internal antennas contribute to sleek design aesthetics and eliminate possibility of damage to them had they
been subject to external exposure, while still providing good range.
5. Transmitter uses readily-available 9V battery.
6. Transmitter shell made of tough Lexan® for durability.
7. Real compression-dome push buttons instead of short-lived conductive silicone membrane pads are used for
years of dependable operation.
8. Highest quality motorized attenuator employed for critical audio path with very good inter-channel match-
ing (no silicon attenuators here!)
9. Two-step attenuator rotation speed: Press and hold a button; for the first half second the attenuator mo-
tor runs slowly so the user may “nibble” at the volume setting. After half of a second, the motor rotation rate
doubles to move things right along.
10. Remote transmitter keep-alive interval keeps Remora Remote awake for a few seconds AFTER either but-
ton is released, as indicated by the LED lamp glowing DIM green or red. Keeping the microprocessor awake
shaves a few dozen milliseconds off of the wake-up time, and helps to make the remote system more respon-
sive.
11. Flash memory inside both the transmitter’s and the receiver-decoder’s CPU eliminates the need for back-
up batteries or super-caps, etc.
12. Clever system architecture and user-programming procedure eliminates the need for dip-switches and as-
sociated fiddling with awkward dip switch arrays.
13. Remora Remote consumes very little power which yields long battery life.
14. Electrically quiet operation preserves low noise floor of the preamplifier’s audio path.
15. Discrete passive volume control offers highest headroom option over silicon-based devices.
Precautions when using the Remora Remote system:
Use only fresh alkaline 9-volt (006P) batteries in the remote transmitter. The power draw is small during
transmit events, and nil when on standby. Unless the transmitter is used very heavily, the battery should last
for at least a year, or for about 10 hours of continuous transmit time. If the remote not used very often then the
battery life should equal its shelf life.
The remote transmitter operates on 433.9 MHz, and features a tuned antenna for reasonable efficiency and
extended battery life. As with other RF equipment of this sort, the range can be influenced if the antennas on
either side of the link are hampered by obstructions that deflect or attenuate the radio signal. Neither the trans-
mitter nor the receiver should be used or placed behind conductive surface planes, or on top of large metal
cabinetry, since this can effectively reduce or block the radio signals.
The tuned antenna is positioned at the top or “nose” of the transmitter housing. Best range can be obtained by
keeping your hand clear of the top of the enclosure during operation. Range may be severely cut if the remote
is placed on a conductive (metal) surface, such as a filing cabinet or other piece of equipment, since the metal
plane will grossly detune the antenna. When the transmitter is operated in the palm of your hand, you may
expect the remote range to be at least 15 meters line-of-sight, typically 20 meters (or more) in most settings.
Radio-based systems can be affected by noise or interference occurring on the operating channel. Various gov-
ernment bureaucracies dictate what radio channels may be used depending on several factors such as country
where the remote system is to be operated, the exact nature of the transmitted information and so forth. Be-
cause of these limitations, the channels used for remote controls of this sort can be crowded, especially where
population density is high. In addition to on-channel interference, the desired radio signal may be received
perfectly when the remote transmitter is in one location, but mysteriously “drop out” when the transmitter is
move a few inches one way or another. The transmitter may need to be rotated or relocated slightly to avoid
RF “null” points.
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