TR2M ETC2 [List of Unclassifed Manufacturers], TR2M Datasheet - Page 3

• Manufacturer Part Number: TR2M
• Description: Narrow Band FM Multi-channel UHF Transceiver
• Manufacturer: ETC2 [List of Unclassifed Manufacturers]

P
Pins
A1
A2
B1
B2
B3
C1
C2
C3
C4
C5
C6
C7
C8
C9
C10
C11
C12
C13
Notes:
Radiometrix Ltd
C: 1
C: 2 TXD (MOD NC)
C: 3 AF in (MOD NC)
C: 4 RSSI
C: 5 SQF (MOD NC)
C: 6 AF out
C: 7 RXD (MOD NC)
C: 8 +4.4V out
C: 9 0V
C: 10 PGM
C: 11 P1 (MOD TXD)
C: 12 P2 (MOD RXD)
C: 13 P3 (MOD NC)
A: 1 Vcc
A: 2 Gnd
B: 1 RF Gnd
B: 2 RF in
B: 3 RF Gnd
in Description - TR2M
1. TR2M receiver section inverts the sense of the baseband stream, so a logical inversion is present
2. Carrier detect on TR2M mutes the AF Out and RXD outputs. It can be factory disabled.
3. All the open collector outputs must be connected to Vcc/+4.4V out via a pull-up resistor.
4. The software incorporates a 1200baud dumb modem, compatible with that implemented in
5. With 1200baud modem mode enabled, parallel selection of channel is unavailable as the P1-P3
6. PGM and MOD TXD (pin 10 and 11) tolerate true ±RS232 levels. No buffering is required.
TXE (MOD TX_ON)
Name
Vcc
GND
RF GND
RF
RF GND
TXE (MOD TX_ON)
TXD (MOD NC)
AF in (MOD NC)
RSSI
SQF (MOD NC)
AF out
RXD (MOD NC)
+4.4V out
0V
PGM
P1 (MOD TXD)
P2 (MOD RXD)
P3 (MOD NC)
between input of TX and output of RX. A version is available (TR2I) which inverts the transmit
datastream as well (resulting in no net inversions between a pair of TR2I radios).
TX2M, RX2M radios (I1200 tones and format)
lines are used for modem input/output operations.
Figure 3: TR2M Footprint (Top)
B
3.1mm
A
Function
4.5V-16V
Ground
RF ground
To the antenna
RF ground
Transmitter Enable. Low = ON, Open = RX mode. Internal 10kΩ pull-up to 4V
AC coupled Analogue Input Limit to 1V
peak deviation >2.5kHz
DC level between 0.5V and 2.5V. 60dB dynamic range
Noise operated carrier detect. Open collector. ON/low = no signal
200mV
Open collector output of data slicer suitable for Biphase codes
Regulated DC supply. 75mA max. drain. Present if unit is powered
Ground
Serial programming/configuration input at RS232 level
Parallel frequency select inputs. Inverted logic, internal 10kΩ pullups to 4V
DC coupled digital data input for 3-12V CMOS logic. Leave open if unused
1
8.9 mm
pk-pk
audio. DC coupled, approx 1V bias. Muted by squelch
59mm
53.3mm
TR2M Data Sheet
Squelch adj
Input gain
.
.
C
1
pk-pk
Unit height
±10% to keep distortion <1.5% and
10mm
page 3