Multiplex RX-7 SYNTH DS M-PCM Instructions page 11

Parameter Set value after
Reset
RF channel
none (automatic
channel search after
switching on)
Low voltage
4.0 V
Hold duration
0.9 seconds
Fail-Safe duration
16 seconds
Fail-Safe release none
Fail-Safe settings neutral (UNI)
9.6 Error counter
The receiver features three error counters: for low-voltage, RSSI
(field strength) and PCM errors.
RX-7-SYNTH DS M-PCM and RX-9-SYNTH DS M-PCM com-
pact:
The sum of all errors is indicated by the (STATUS) LED.
RX-9-SYNTH DS M-PCM and RX-12-SYNTH DS M-PCM:
These two receiver types are equipped with a separate LED for
each type of error.
If errors are indicated, they can be stored once the model has
landed by pressing the SET button (
( 12.).
In our experience errors are recorded after virtually every flight.
Generally speaking they are not noticed by the modeller, but are
picked up by the highly sensitive glitch counter. After a few
flights and regular analysis of the error counter you will have
sufficient experience to assess its findings, helping you to detect
changes in good time, and to recognise indications of possible
causes of interference. For example, glitches could be due to
problems in the power supply, by interference caused by the
power supply, metal-to-metal noise, etc.
1. Operating voltage errors (BATT-ERR)
Examples: flat or faulty battery, inadequate cable cross-
section, etc.
The counter records voltage collapses below the set thres-
hold of 4.0 V (this value can be altered using the MULTImate
or a PC 12.). If battery voltage remains below the thres-
hold, RF errors and PCM errors are not counted, as it is
highly likely that they are caused by the low voltage itself.
2. RF field strength errors (RSSI-ERR)
Examples: field strength "black spots" at the flying site, flying
the model at the limit of range, etc.
The counter records field strength collapses below a pre-set
minimum. If the field strength remains below the minimum,
PCM errors are not counted, as it is highly likely that they are
caused by the field strength collapse itself.
3. Signal (PCM) errors (PCM-ERR)
Examples: ignition interference, static discharge, etc.
The counter records interference to the PCM packet.
Protracted voltage collapses to below 3.0 V will force the
receiver to re-start; this causes the recorded values for the three
error counters to be lost.
Errors tend to occur immediately after the receiving system is
switched on. For this reason the error counters only starts
recording data five seconds after the receiver is switched on.
MULTIPLEX Modellsport GmbH & Co.KG • Westliche Gewerbestraße 1 • D-75015 Bretten (Gölshausen) • www.multiplex-rc.de
Operating Instructions - RX-7/9/12-SYNTH DS M-PCM /
RX-9-SYNTH DS M-PCM compact receivers
Values can be
altered using
MULTImate &
RX-SYNTH
DataManager
yes
yes
yes
yes
servo by servo
servo by servo
9.2) and read out later
If you press the SET button in order to store the error count,
the data is maintained until the next time you store error data.
10. R D
ECEIVER IVERSITY
Receiver Diversity operations are possible with MULTIPLEX M-
PCM receivers. For this you need any two M-PCM receivers on
the same frequency band, which are inter-connected using the
Diversity lead (# 8 5070). Both receivers receive and assess the
signals. Orientating the two receiver aerials in different direc-
tions significantly improves reception performance, since this ar-
rangement minimises directional aerial effects. This means that
the receiver has a good "view" of the transmitter regardless of
the model's attitude. Diversity mode therefore provides an
additional safety margin. Receiver diversity is particularly
recommended if you fly large-scale model aircraft. For details
please refer to the operating instructions supplied with the
Diversity lead for RX-SYNTH M-PCM receivers (# 8 5070).
11. D O
IAGNOSIS PERATION
Diagnosis operation enables you to carry out adjustments to
your model without the transmitter generating an RF signal. The
transmitter does not require an RF module for this.
A MULTIPLEX switch harness with charge socket is used to
inter-connect the transmitter and receiver using the Diagnosis
lead (# 8 5105). The transmitter must be set to M-PCM modu-
lation.
When the Diagnosis lead is disconnected, neither the transmitter
nor the receiver switch back to normal RF operation.
For this reason: first switch the receiver OFF, then the trans-
mitter OFF, then disconnect the Diagnosis lead.
12. MULTI
MATE AND THE
D M
ATA ANAGER
All MULTIPLEX RX-SYNTH DS M-PCM receivers feature
modern micro-controllers (exploiting FLASH technology). This
makes it possible to connect the receivers to the MULTImate
(# 8 2094) or a PC or laptop using the PC connecting lead
(# 8 5149 USB or # 8 5150 serial).
The RX-SYNTH DataManager PC program is available as a
free download from the MULTIPLEX website (www.multiplex-
rc.de). This program and / or the MULTImate opens up further
possibilities with M-PCM receivers:
•
Expanded receiver options are available, including freely
variable Hold and Fail-Safe times, activating / disabling Fail-
Safe for separate channels, manual setting of RF channel, ...
•
Read out error counter / memory
Read out error count, signal errors, field strength errors and
low voltage errors separately.
The RX-SYNTH DataManager also permits the following:
•
Software updates
•
Scanner function
Graphic display of all channels in use on the relevant fre-
quency band. Includes Alarm and Logbook function.
RX-SYNTH
PC P
ROGRAM
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