WisyCom MSR916 User manual

MSR916 User Manual
SN: ________________
Rev. 01
Date: 26 November 2014
True diversity
Receiver Module

1
FEATURES
Available in various ranges:
VHF ⇒150 ÷ 250 MHz,
UHF ⇒470 ÷ 880 MHz
Wide pre-tuned switching-window:
⇒15 MHz in 140 ÷ 250 MHz range,
⇒15 MHz (VHF) ; 32 MHz (UHF)
16 switchable frequencies
Easy PC frequency-reprogramming by the user (in the pre-tuned switching-window).
Friendly factory frequency re-allocation (in the whole working-range).
Broadcast superlative quality of any audio-signal transposition.
Suitable for very complex multi-channel systems thanks to the extraordinarily high
intermodulation immunity and RF/IF selectivity.
Very easy and friendly to operate.
Exceptional sturdiness and absolute reliability.
SAFETY INSTRUCTION
Read this safety instruction and the manual first
Follow all instructions and information.
Do not lose this manual.
Do not use this apparatus under the rain or near the water.
Do not install the apparatus near heaters or in hot environments, do not use outside the
operating temperature range.
Do not open the apparatus, only qualified service technician are enabled to operate on it.
The apparatus needs servicing when it is not properly working or is damaged by liquids,
moisture or other objects are fallen in the apparatus.
Use only accessories or replacement parts authorized or specified by the manufacturer.
Clean the apparatus only with dry cloths, do not use liquids.
Report the serial number and the purchasing date in front of the manual. It is needed to
have proper replacement parts or accessories from the manufacturer.
When replacement parts are needed, use only replacement parts authorized from the
manufacturer. Substitution with not authorized parts could result in electric shock,
hazards or fire.
Keep attention on all the labels with warnings or hazards on the apparatus.

2
FRONT PANEL CONTROL AND FUNCTIONS
❶❷ ❸ ❹❺ ❻ ❼ ❽
❾❿ ⓫ ⓬ ⓭ ⓮
❶REMOTE indication. The red Led lights is on when the remote control interface is active (optional, on
request).
❷CHANNEL switch (with back-light).
❸MONITOR output connector (standard ¼”, i.e. 6.3 mm, stereo jack, parallel wired).
❹Multifunction display, RF section. The following parameters are simultaneously displayed:
“A” antenna RF-signal (bar-graph) “A” antenna selected (Led Ais on)
“B” antenna RF-signal (bar-graph) “B” antenna selected (Led Bis on).
❺Multifunction display, AF section. The following parameters are displayed:
AF line output level (bar-graph) Open squelch (Led AF ON is on).
❻Multifunction display, Batt. section ( TX % battery lifetime: 100%, 75%, 50%, 25%, 12%).
❼LINE OUT connector.
XLR3-M type:
pin 1 = ground;
pin 2 = AF-a;
pin 3 = AF-b
The line-output is transformer-balanced and floating.
❽RXA and RXB antenna connectors (N-F type).
❾ON on/off switch (with Led indication).
❿SQUELCH threshold adjustment (between 0 ÷ 50 V).
⓫Monitor VOLUME.
⓬CH GROUP: channel’s group switch [ #1 / #2 ] (when on, green Led indicates group #1).
⓭T.SQL: tone-squelch function switch [ On / Off ] (when on, yellow Led indicates tone-squelch on).
⓮P.TONE (Pilot Tone) indication. The yellow Led lights on when the matching pilot sub-carrier is
received.

3
REAR PANEL
⓯⓰⓱
⓯Connector for remote-control interface (type D25-F connector) Optional, on request.
⓰Product Label reports the following information:
Product code
Serial number
Compander (ENR or NR)
Band limits
Option
⓱DC-input connector (XLR4-M type) Powering: 10.5 16 Vdc, 500 mA max.
pin 1 & 3 = ground;
pin 4 = +Vcc input;
pin 2 = +Vcc output controlled by squelch-relais.

4
PUTTING INTO OPERATION
Connect the power supply to the XLR4-M connector ⓱ (see optionals PSP910-X4)
Connect the antennas to the N-F antenna connectors ❽
Connect the mixer/amplifier to the Line out connector ❼
Put the selector ❾ to ON and verify the led indicator is turned on
Turn off all the transmitters
Chose the desired frequency rotating the Channel switch ❷ (prefer a channel with
no RF level or low level on bars ❹)
NOTE: a label placed on the top of the receiver shows the pre-configured frequencies list
on the 2 groups (16 + 16 frequencies) . Selector ⓬allows to change group#1-group#2.
Select the appropriate squelch turning the knob from 0µV to 50µV: increase
gradually the squelch level and stop when there is no RF level on bars ❹
Switch on the transmitter (on the same frequency of the MSR16)
verify the AF ON indicator is ON
NOTE: AF ON indicator reports the state of the audio output on connector ❼:
led ON presence of audio output
led OFF absence of audio output
See troubleshooting section for more details
verify the bar ❺ (AF line output level) and adjust the audio gain on the transmitter
in order to avoid clipping (never red levels on AF bar)
NOTE: using Wisycom transmitter only :
if the transmitter sends the pilot sub-carrier, the P.TONE indicator ⓮turns on with
yellow colour and the battery charger of the transmitter is shown on bar ❻ of the
MSR916
if the T.SQL selector is set to ON, the audio output is enabled only if the tone squelch
is detected (P.TONE indicator yellow) and the RF level is above the squelch level

5
Troubleshooting
No audio output
Check AF ON indicator: if it is OFF, verify T.SQL and SQUELCH
setting according the following table
SQUELCH setting
T.SQL setting
AF ONaudio
output enabled
RF level<SQUELCH
T.SQL = OFF or ON
off
RF level>SQUELCH
T.SQL = OFF
on
T.SQL = ON &
P.TONE is OFF
off
T.SQL = ON &
P.TONE is ON
on
Check RF level bar: if they shows no level or low level, try to
decrease the squelch level
If T.SQL is set to ON but the P.TONE indicator is OFF
check on the transmitter’s configuration if the Wisycom pilot
sub-carries is enabled
change T.SQL to OFF
no levels on battery bar
check on the transmitter’s configuration if the Wisycom pilot
sub-carries is enabled to send battery data
Distortion or unwanted
noise bursts
Remove nearby sources of RF interference (CD players,
computers, digital effects, in-ear monitor system, etc.)
Change receiver and transmitter to a different frequency
Reduce transmitter gain
Replace transmitter batteries

6
TECHNICAL SPECIFICATIONS
Switchable channels
:
16 + 16 preset in the 150 ÷ 250 MHz (VHF) or 470 ÷ 880 MHz (UHF) range (others on
request).
Channel groups
:
2, externally selectable.
Switching-window
:
15 MHz (VHF); 32MHz (UHF).
Frequencies
:
microprocessor controlled PLL frequency synthesizer circuit, with 25 KHz
minimum step.They can be easily user-reprogrammed by PC and optional
“UPK32 or UPK100 Programming kit”.
Frequency error
:
< ± 5 ppm,in the rated temperature range
Temperature range
:
-10 ÷ +55 °C
Modulation
:
FM, with 50 µs de-emphasis.
Nominal deviation
:
±20 kHz @ 1 kHz. (Max. deviation = ±75 KHz).
±40 KHz @ 1 kHz (Peak deviation = ±60 KHz).
“A” / “B” antenna inputs
:
with N-F connectors. RF input impedance = 50ohm (SWR < 1:2; typ. 1:1.4).
Sensitivity (ENR)
:
< 2 µV ( +6 dBµV), for SND/N = 84 dB [1],
< 10 µV (+20 dBµV), for SND/N = 96 dB [1], in the whole switching-range.
Amplitude response
:
< 0.2 dB (forRF input signal between +4 dBµV ÷ +120 dBµV).
Co-channel rejection
:
> -3.5 dB @ 2 µV RF; > -1.5 dB @ 100 µVRF.
Adjacent chan. selectivity
:
> 90 dB (for channel spacing 400 kHz).
Spurious rec. rejection
:
> 93 dB.
IF image rejection
:
> 98 dB.
Intermodul. rejection
:
> 76 dB. IIP3 (Input 3°-order Intercept Point) = +9 dBm.
Spurious emissions
:
< 10pW (typ. = 0.1 pW).
Squelch
:
field-strength:
with externally adjustable threshold and adaptive-mode working (the receiveradapts
itself to the different situations of medium signal-strength levels and fading-speeds).
tone-squelch:
with decoding of the matchingsub-carrier, digitally modulated, generated by the
relevant transmitter. This function can be switched-off for the compatibility with other
brand TXs.
Squelch-controlled DC output-
power
:
is controlled by the squelchcircuit. When the AF output line is active, the DC input-
power is connected to pin 2 of the XLR4-M - DC input-connector on rear-panel (max
current = 2A).
“Noise reduction” system :
:
compander circuit, can be internally pre-set to (or eventually switched off) on
following modes:
ENR (Wisycom Extended-NR;
NR (standard NR), to be compatible with other systems.
AF line output
:
transformer balanced, floating. Output impedance = < 50 ohm.
AF output level
:
+10 dBu (2450 mVrms), @ ±40KHz deviation
AF bandwidth
:
20 Hz ÷ 20 kHz. Frequency response = ±0.5 dB (±0.2 dB typ.) in the 30 Hz ÷ 20 kHz
range.
Distortion
:
< 0.3 % (0.15 % typ.) @ ±40 KHz deviation (< 0.5 % @ peak deviation).
SND/N ratio (ENR)
:
> 105 dB (115 dB typ.) [1].
Monitor output
:
¼” (6.3 mm) stereo jack connector, mono wired, on the front panel.
Monitor output level
:
max 3 Vrms / 200 ohm, with volume control. Monitor output impedance = 35
ohm.
Diversity technology
:
true-diversity (Twin receiver circuits, with high-speed and low-noise electronic
switching).
Remote diversity function
:
the MSR916 receiver, along with audio signal on the line-output, is signalling also the
RSSI level. A Centralized Automatic Selector (i.e.: RDA41, suitable for 4 remote
receivers) can use this voting information to use in any time select the best audio
signal.

7
Bar-graph meters
:
RF field strengths (both “A” and “B” antennas at the same time )
AF output level (-20 ÷ +12 dBu).
TX battery lifetime, 5 steps: 100%,75%,50%,25%, 12% (the last Led blinks ).
Led indications
:
diversity switching (“A” / “B” antenna)
AF output-line is active (AF ON)
matching sub-carrier is present (P.TONE)
channel Group 1 selected (#1)
tone-squelch function is on (T.SQL)
receiver on.
Powering
:
10.5 ÷ 16 Vdc / 4 W (typ.: 350 mA @ 12 Vdc), negative ground
mains 100 ÷ 240 Vac, by means of separated PSP910-X4 “mains-plug” power
supply.
Size
:
240,99 x 225,2 x 43,6 mm (WxDxH)
Weight
:
1.7 Kg approx.
Note [1]: RMS value, unweighted, 22 Hz / 22 kHz, and referred to the peak deviation.

8
OPTIONALS:
AGN00 - Groundplane antenna VHF/UHF
AMB 05 - Magnetic-base antenna, (with 5 m RG58 coax cable).
CDC916 - External 12 Vdc powering cable
PSP 910-X4 - 100 ÷ 240 Vac mains-plug power supply.
RCD 915 - Remote control and monitoring interface (parallel type)
UPK 100 - Working frequencies user programming kit (Interface + software).

9
MECHANICAL DRAWING
Note: unit is mm

10

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•
WISYCOM srl • Via Spin 156 • I-36060 Romano d’Ezzelino • Italy
Tel. [phone] • Fax +39 - 0424 –382733 • www.wisycom.com • e-mail: [email protected]