QPS Splitter Box MK 3

QPS Splitter Box MK 3

This document describes how to use the QPS Splitter Box MK 3.
If you need to transmit Pulse Per Second (PPS) time stamps to various devices at the same time, the Splitter Box can be used.
It has room for one input signal and can output it eight times, either converted to Qinsy format or directly on coax exits.

Overview of the unit:

Dimensions

Front

Front panel, from left to right:

• Power Led

• Input en Output Leds:
  
  • Timestamp
  • TTL Pulse
  • TTL Pulse Converted
• Switch 'Set to Pos Neg Triggering'

Rear

Rear panel, from left to right:

Output

The output contains 3 sets of output connectors (from top to bottom):

1. Timestamp (NMEA ZDA or Trimble UTC) via RJ 45;
   An idea might be to buy a connector to change it back to a DB-9 connector.
   

   

   
   If you want to make your own connector, it is important to know that the data is sent on Pin 5 and the Ground is on Pin 3.

   The following table shows the colors of a standard RJ45 connector:

   Pin number	Color
   1	Orange/White
   2	Orange
   3	Green/White
   4	Blue
   5	Blue/White
   6	Green
   7	Brown/White
   8	Brown

   The connection from RJ45 to DB 9 is shown below:
   

   

2. TTL Pulse Converted (QPS PPS/Fix Adapter) to Qinsy
3. TTL Pulse to other devices

Input

Set of Input Connectors, from top to bottom:

• Time stamp (NMEA ZDA);

• TTL Pulse.

Power

• 12VDC Fuse holder
• Adapter
  
  • IN: 100-240 V~ 50-60Hz 250mA
  • OUT: 12V / 1A
  • 4 additional adapters:
    • Type A
    • Type C
    • Type I
    • Type G

QPS TTL /RS232 Splitter Device

This unit, which is built as a 19" rack unit, can split RS232 and TLL Data in a fast and safe way.
Data is then available on 8 (galvanically separated) Output ports.

It is powered individually with an external Power Supply with a Mains Voltage ranging from 100 to 240 Volts AC.

An RS232 signal is transmitted 1-on-1 to the Output ports. The output ports are RJ45. Data is transmitted on pin 5 and the Ground is on pin 3.

FIX pulses are transmitted 1-on-1 to the 'TTL pulse' Outputs and to the 'TTL Pulse Converted' Outputs.

De 'TTL Pulse Converted' Outputs are equipped with the same logic as the separately available QPS PPS/Fix Adapter.

Timestamp

The 'Male' D-Sub Input connector is meant for the Time stamp message (NMEA ZDA / Trimble UTC) or any other RS232 signals with a speed of up to 115 kB.

Multiple NMEA messages can be send to the input port i.e.: ZDA + GGA + GST + VTG + UTC, which all will be available on the NMEA output ports.
The signals will be transmitted 1-on-1 and are not inverted.
The 'Timestamp' LEDs on the front panel will indicate activity.

TTL Pulse

The 'BNC' Input connector supplies the incoming signal 1-on-1 to the the 8 other 'BNC' connectors.
The LEDs 'TTL pulse' on the front panel will show this activity.
At the same time the input 'BNC' connector activates the electronics behind the 8 'female' D-Sub connectors, which will output same output as the QPS PPS/Fix Adapter.
This output should be connected with a straight serial cable (Male - Female) to a COM port of a Qinsy PC. You will be able to feed up to 8 individual Qinsy PC's with a Qinsy converted PPS / Fix signal.

TTL Pulse Converted, Set to Pos Neg Activation

To prevent time delay at negative logics these 8 'Converted' signals are equipped with the possibility to start both on the Positive as well as on the Negative flank.
The entered setting is the same for all 8. The switch 'Set to Pos Neg Triggering' is situated on the front panel.
The LED 'TTL Pulse Converted' shows whether this was set correctly.
It should flash at the same time as the 'TTL Pulse' LED.
Should the 'TTL Pulse Converted' flash after the 'TTL Pulse' LED then it is sufficient to use the switch 'Set to Pos Neg Triggering' to synchronize both signals.

The table below illustrates which timing error will occur when the switch 'Set to Pos Neg Triggering' is set in the wrong position:

Trimble Pulse

We made a modification to the splitter box which enables working with a short pulse (for example the Trimble pulse: 8 μsec).

Technical Data

Mains Power: 100-240V AC, fuse 1Amp.
Fuse: 12V DC 630mA Fast.

Input signals

• Male D-Sub conn.: RS232, Timestamp (NMEA ZDA / Trimble UTC)

  

  Pin Layout

  As from SN 225112 onward PIN 2 (Rx) and PIN 5 (GRD)

  Before SN 225112 PIN 3 and 5

• BNC conn.: TTL signal (Max 6 Volts DC) (Pulse per Second)

Output signals

• 8 RJ 45 conn.: RS232 out

  • Output on PIN 3 and 5
     

• 8 Female D-Sub conn.: TTL Pulse Converted out
  • Output on PIN 2 and 5
      
• 8 BNC conn.: TTL pulse equals input pulse

Unit must be connected through power cord to Earth or Ground.
Maximum Input & Output cable length: <3mtr or <10’.

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