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PRX4 & PRX4SERL Four Zone Receiver Decoder

Ref: RX4USER

Page 8 of 8

Issue 1

Specification

Power Input:

12V to 13.8V dc max @ 0.5A

Power Consumption
Standby (relays off, no serial port)

28mA

Standby (relays off, serial port connected)

38mA

Active

serial

decoder 63mA

Active

all

relays

250mA

Signal Format

POCSAG FSK NRZ (Normal or Inverted)

Frequency (fixed crystal)

In the range 440 –470MHz

Frequency

Stability

+/-

10ppm

Channel

Spacing

12.5

25KHz

Frequency

Deviation +/-

4.5KHz

Over Air Baud Rate (fixed programmable)

512 or 1200 bps

Sensitivity

Maximum

512bps 6

V/m

1200bps

7.5

V/m

Selectivity

>52dB

Image

Rejection

>52dB

Spurious

Rejection

>60dB

Intermodulation

>52dB

Relay Contact max rating

0.5A @ 125V ac, 1A @ 60V dc

Serial

Port

RS232

Serial

Configuration

Serial Port baud rate

9600

E & OE. Scope’s policy is one of continuous development and specifications are subject to change without notice

Summary of Contents for PRX4

Page 1: ...Scope Communications UK Ltd Quantum House Totnes Devon TQ9 5AL England Tel 01803 860700 Email sales scope uk com Ref RX4USER Issue 1 PRX4 PRX4SERL Four Zone Receiver Decoder User Manual ...

Page 2: ...this equipment is governed by our standard terms and conditions of sale which can be found on the reverse of all order acknowledgements proforma invoices delivery notes price lists and invoices Alternatively these can be provided on request Faxed proforma invoices and quotations refer to conditions available upon request Important Safety Information Scope products are designed to operate safely wh...

Page 3: ...free from defects of workmanship and materials for a period of one year from the original purchase date During this time if there is a defect or malfunction of this product Scope will with proof of purchase repair or replace at it s discretion any defective parts free of charge This does not include where the adjustments parts and repair are necessary due to circumstances beyond the control of Sco...

Page 4: ...rt providing a data logging function text only The unit can optionally be configured to send Scope protocol for onward transmission using a Scope transmitter on a different frequency Power input for both units is 12V dc 0 5A via the blue latching connector provided Section 1 Installation Certain precautions in siting of the unit apply As with all radio equipment attention must be given to the aeri...

Page 5: ... alongside other cables and avoid kinks and coils Pre terminated cable should not be altered 3 Avoid mounting the receiver in the immediate vicinity of telephone exchanges or computer equipment 4 Always use 50 ohm coaxial cable between the antenna and the receiver If cable runs exceed 5 metres always use low loss 50 ohm cable such as RG213 or UR67 to a maximum of 15 metres Coaxial cable intended f...

Page 6: ...one 1 relay on the PRX4 will de energise The same applies for zones 2 3 and 4 and their corresponding relays The serial port is not used on this model Power input is 12 to 13V dc 0 5A via the blue connector provided See diagram 1 for the correct polarity connection PRX4SERL This unit utilises ostensibly the same hardware as the PRX4 but has different firmware which facilitates the following featur...

Page 7: ...de 0000008 will reset the unit and de energise all the relays Note where the serial port has been set to output Scope protocol it must be connected to a valid serial port for this feature to operate The unit can also be reset by depressing SW1 through the hole provided on the lower endplate see Diagram 1 below ...

Page 8: ... fixed crystal In the range 440 470MHz Frequency Stability 10ppm Channel Spacing 12 5 or 25KHz Frequency Deviation 4 5KHz Over Air Baud Rate fixed programmable 512 or 1200 bps Sensitivity Maximum 512bps 6µV m 1200bps 7 5µV m Selectivity 52dB Image Rejection 52dB Spurious Rejection 60dB Intermodulation 52dB Relay Contact max rating 0 5A 125V ac 1A 60V dc Serial Port RS232 Serial Configuration N 8 1...

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