Alpermann+Velte GPS D25 R 6 User manual

Operating Manual
Version: 2.1
May 6, 2002
•Display with built-in GPS receiver
•DC input for GPS receiver separated
•Output of time/date as serial data and as coded seconds pulses
•Optional: Master output to connect analogue clocks
GPS D25 R/G/Y 6

Operating Manual GPS D25 R/G/Y 6
Page 1
TABLE OF CONTENTS Page
A1 SAFETY INSTRUCTIONS
A2 COPYRIGHT
A3 CE-DECLARATION
SYSTEM DESCRIPTION 4
OVERVIEW 4
THE BUILT-IN GPS RECEIVER 4
SPECIFICATIONS OF THE GPS RECEIVER 5
CONFIGURATION 6
ANTENNA: MOUNTING, CONNECTING AND TECHNICAL DATA 6
Antenna of type: M/A-COM ANP-C-114-4 7
Antenna of type: planTec navigation 60 magnet 8
Antenna of type: planTec navigation roof 9
DISPLAYING TIME, DATE AND STATUS INFORMATION 10
OPTIONAL: MASTER OUTPUT AND CONNECTING SLAVE ANALOGUE CLOCKS 11
REAR AND TECHNICAL DATA OF THE DISPLAY 12

Operating Manual GPS D25 R/G/Y 6
Page 2
A1 Safety Instructions
General rules:
General rules:General rules:
General rules: Only use the device as directed in a dry atmosphere. Treat the GPS
D25 R/G/Y 6 with the same care as other studio devices. Please
follow the advice in the following operators manual.
Damages in transit:
Damages in transit:Damages in transit:
Damages in transit: If the device shows obvious damages from transit the shipper in
question must be notified and the dealer must be informed.
Positioning:
Positioning:Positioning:
Positioning: Position device only where sufficient air circulation can be
maintained. Extreme temperatures, dust, humidity, shocks and
strong electromagnetic fields must be avoided.
Maintenance:
Maintenance:Maintenance:
Maintenance: Use a moist soft textured fabric cloth when cleaning the housing.
Do not use polish or any other cleaning agents.
Repairs:
Repairs:Repairs:
Repairs: The GPS D25 R/G/Y 6 does not require any extra maintenance.
There are no user serviceable parts inside the device. Repairs
should be sent to an authorized service partner.
..
.
EMC:
EMC:EMC:
EMC: The EMC regulations are observed only under the following
condition: use high quality shielded cables at data inputs and
outputs.
..
.
A2 Copyright
No part of this publication may be reproduced, translated into another language, stored in
a retrieval system, or transmitted, in any form or by any means, electronic, mechanical,
photocopying, recording, or otherwise without the prior written consent of
Alpermann+Velte Electronic Engineering GmbH. Technical changes are reserved. All
brand and product names mentioned herein are used for identification purposes only, and
are trademarks or registered trademarks of their respective holders.
Information in this publication replaces all previously published information.
Alpermann+Velte Electronic Engineering GmbH assumes no responsibility for errors or
omissions. Neither is any liability assumed for damages resulting from the use of the
information contained herein. Whenever it is likely that safe operation is impaired, the
instrument must be made inoperative and secured against unintended operation. The
appropriate service authority must then be informed.
Copyright © Alpermann+Velte Electronic Engineering GmbH 1999-2000. All rights reserved.
For further information please contact your local dealer or:
Alpermann+Velte
Electronic Engineering GmbH
Otto-Hahn-Str. 42
D-42369 Wuppertal
Phone: ++49 - (0)202 – 244 111 0
Fax: ++49 - (0)202 – 244 111 5
E-Mail: [email protected]
Internet: http://www.alpermann-velte.com

Operating Manual GPS D25 R/G/Y 6
Page 3
A3 CE-DECLARATION
We,
Alpermann+Velte
Alpermann+VelteAlpermann+Velte
Alpermann+Velte
Electronic Engineering GmbH
Otto-Hahn-Str. 42
D-42369 Wuppertal, Germany
declare under our sole responsibility that the unit
GPS D25 R/G/Y 6
meets the intent of the following directives, standards and specifications:
89/336/EEC Electromagnetic Compatibility
EN 50081-1 Emissions
•EN 55022
•EN 55103-1
EN 50082-1 Immunity
•EN 55024
•EN 55103-2

Operating Manual GPS D25 R/G/Y 6
Page 4
System Description
Overview
GPS D25 R/G/Y 6 are displays (7-segment LEDs) of 25mm digit height. R or G or Y
responds to the colour of the LEDs: R = red, G = green, Y = yellow. Digit 6 stands for a 6-
digit display.
The brightness
brightnessbrightness
brightness of the LEDs is adjustable by using the BCD turn switch
BCD turn switchBCD turn switch
BCD turn switch located at the front:
0=1, 2, 3, 4, 5, 6, 7=8=9.
After power-on the display will show the revision number (e.g. ‘5.9 TH‘), any built-in
options and the selected operating mode. To select the operating mode
operating modeoperating mode
operating mode use HEX turn switch
HEX turn switchHEX turn switch
HEX turn switch
at the front. Select e.g. mode = 4 to display the time of the GPS receiver.
Mode Description
0...3 reserved
4Time
TimeTime
Time of the GPS receiver = time of the receiver or of the free-running clock
5Date
DateDate
Date of the GPS receiver = date of the receiver or of the free-running clock
6...7 reserved
8 Time/date of the last synchronisation of the receiver
9 Status information of the GPS receiver
A...F reserved
After a change of the mode with the HEX turn switch the display indicates the new mode for
a moment, e.g.: ‘Mode 5‘.
The built-in GPS receiver
The display has a built-in GPS receiver. An active antenna is connected via a 50 Ωcable at
a SMA female connector. Its built-in pre-amplifier is supplied via the same cable. No
passive antenna must be connected, as this normally causes a DC short circuit. The time
received is output via DSUB female connector every second as a serial telegram.
When the unit is powered off, the real time continues counting battery-powered with the
accuracy of the x’tal (see technical data). So when the unit is powered on, a time
information will be available immediately. With the first synchronous reception of the GPS
receiver (under normal conditions of reception this will take 10 minutes approx.) a switch-
over to GPS time is made. This time is transferred to the output connector with an accuracy
of ± 2µs (jitter) approx. for the seconds pulse (± 20µs for the serial telegram). If then a
GPS reception failure occurs, the time will continue counting with an accuracy of 1µs per
second (10-6). The only pre-condition is that the temperature-compensated x’tal has
meanwhile reached its operating temperature.
The switch-over for Daylight Saving Time will be made automatically. The only time
supplied by GPS is the world time UTC (Universal Time Co-ordinated), i.e. the receiver does
not supply any information about the moments of time for the switch-over. Therefore, this
time is defined according to the current valid legal provision regarding the Central
European Time (CET/CEST), i.e. the last Sunday of March resp. October at 1:00 UTC. If

Operating Manual GPS D25 R/G/Y 6
Page 5
such switch-over is not required, the receiver may be switched via internal dip-switch to
UTC.
Three LED’s indicate the operational status of the receiver:
LED Color Function
MOD green Flashing with every internal transmission of a data telegram.
FREE red Lights up if the receiver is operating in the free-running mode. Will
go out if a sufficient number of satellites has been detected to
ensure synchronisation.
In addition the FREE-LED indicates with a blinking in five-second intervals the exact status of
synchronization.
LED FREE Reception status Satellites in reception
Blinks continuously no synchronization since switch-on none
Blinks with brief
Interruptions in five-
second intervals
no synchronization since switch-on number of interruptions
corresponds to number of
satellites in reception
Switched-off, but
blinks briefly in five-
second intervals
real-time information was received but
reception is not possible at the
moment
four times blinking means:
no satellites in reception.
Every less blink means: one
more satellite in reception
Switched-off synchronous at least four
Specifications of the GPS receiver
Antenna input 1575,42 MHz (L1 band), -130 dbW
to -163 dbW
Antenna connector SMA female, 50 Ω
Antenna type active
Power supply pre-amplifier 5 V DC, 100 mA max., short circuit proof
Time from power-on to first synchronous
reception
10 minutes approx.
Battery 3 V lithium, working life: 10 years
Date validity until 31.12.2017
Accuracy (of P_SEC leading edge):
in free-running mode at delivery adjusted to <2ppm/25°C
at 15-35°C: <4ppm
at 10-40°: <8ppm
at 5-45°: <20ppm
aging (first year): < 3ppm
jitter at synchronous reception ± 2µs (2ppm)
in free-running mode after first synchronous
reception
± 1µs (1ppm)

Operating Manual GPS D25 R/G/Y 6
Page 6
Configuration
The GPS receiver may be configured via an 8-fold internal dip-switch. With standard
delivery all switches are set to “off“ except switch 7 = “on”.
Switch Setting
12345678
off off 2400 Baud
off on 4800 Baud
on off 9600 Baud
on on 19200 Baud
off off Data format 7E2
off on Data format 7E1
on off Data format 7N2
on on Data format 8N1
off Receiver supplies CET / CEST
on Receiver supplies UTC
off GPS configuration from ROM
on GPS configuration from RAM
off P_SEC = pos. pulse 135ms approx.
on P_SEC = modulation 100ms / 200ms
x reserved
Antenna: mounting, connecting and technical data
The GPS receiver is connected to the antenna with a 50 Ωcoax cable. The receiver has a
SMA male connector, the connection at the antenna depends on the type of the antenna.
Only an active antenna should be connected, its built-in pre-amplifier is supplied via the
same cable.
We recommend that the cable should be as short as possible. The shorter the cable, the
less the attenuation and the more likely the chance to receive signals from a sufficient
number of satellites even under unfavourable reception conditions. Cables that are too
long should be shortened if possible. The cable should not be coiled up (to a ring e.g.),
since this will act like a stop filter for the GPS antenna signals. Instead, lay the cable like a
string, i.e. as straight as possible.
The antenna is designed for outdoor mounting. Install antenna in horizontal direction, the
antenna should “see” a maximum of the sky.

Operating Manual GPS D25 R/G/Y 6
Page 7
Antenna of type: M/A-COM ANP-C-114-4
Attention: discontinued product (01/2002).
Connect the cable to the antenna with a TNC connector (female at antenna). The TNC
connector has a rubber protection against atmospheric exposure. The antenna cable is part
of the standard accessory: cable RG 58, length = 10m.
Example of cable types available:
Cable Length
RG 58 7,5 m (typ.) to 10 m (max.)
RG 400 10 m (typ.) to 15 m (max.)
Specifications
SpecificationsSpecifications
Specifications
Frequency 1575 MHz ± 2 MHz
Gain, Zenith 3.5 dBic
Gain, +10° -3.0 dBic
Amplifier gain 26 dB
Amplifier noise figure 2.5 dB (typ.)
Power supply 5 V DC, 25 mA typ
Housing colour white
Operating temperature -40°C to +85°C
Weight 150 g (max.)
Mechanical Data
Mechanical DataMechanical Data
Mechanical Data
Mount the antenna using the screwed joint underneath.
All figures in inches

Operating Manual GPS D25 R/G/Y 6
Page 8
Antenna of type: planTec navigation 60 magnet
This antenna’s cable is permanently connected and sealed to the side of the antenna. Type
of cable = RG 174 with length ≈10m.
Technical data
Technical dataTechnical data
Technical data
Frequency range 1575,42MHz
VSWR < 1,5 typ
Gain with integrated amplifier 25dB typ
Power supply 5V DC
2,5mA typ, 30mA max
Color of housing Anthracite
Operating temperature -40°C - +85°C
Weight ≈50g
Mechanical
MechanicalMechanical
Mechanical
Magnetic mounting at metallic surfaces.
∅72mm
Height 15mm

Operating Manual GPS D25 R/G/Y 6
Page 9
Antenna of type: planTec navigation roof
This antenna’s cable is permanently connected and sealed to the bottom of the antenna.
Type of cable = RG 174 with length ≈10m.
Technical data
Technical dataTechnical data
Technical data
Frequency range 1575,42MHz
VSWR < 1,5 typ
Gain with integrated amplifier 25dB typ
Power supply 5V DC
25mA typ, 30mA max
Color of housing black
Operating temperature -40°C - +85°C
Weight ≈50g
Mechanical
MechanicalMechanical
Mechanical
The antenna is mounted by using its centred M16 screw thread.
The antenna has two different moisture seals:
•A seal around the circumference of the antenna.
•Around the screw thread via use of the smaller O-Ring.
∅95mm
Antenna height without screw
thread
16mm
Length of the screw thread 15mm

Operating Manual GPS D25 R/G/Y 6
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Displaying time, date and status information
Four stages of the HEX turn switch are reserved to display data from the GPS receiver:
Mode 4 Displays the time of the GPS receiver.
Mode 5 Displays the date of the GPS receiver.
Mode 8 Display shows the moment when the GPS at last has been synchronised
(receives valid time/date from the antenna signal). The display switches every 5
seconds between time and date indication. The time counts upwards if the GPS
receiver currently stays in sync. Otherwise the time stops, the receiver clock is in
free run mode since the displayed time. Showing only bars means no
synchronisation has been made since last power-on.
Mode 9 Displays status information:
Digit 1
0, 1-7
Digit 2 Digit 6
-, n -, F
Digit 3 Digit 4
-, A, L-, S, U
Digit 5
Digit 2: 1-7 = current day-of-week, 1 = Monday.
0= receiver does not transfer a day-of-week status.
Digit 3: -= GPS antenna signal found,
n= no GPS antenna signal found.
Digit 4: -= receiver clock synchronised,
F= receiver clock not synchronised, free running.
Digit 5: -= time zone CET (Central European Time),
S= time zone CEST (Central European Summer Time),
U= time zone UTC.
Digit 6: -= no announcement of a time change-over,
A= announcement of a Daylight Savings Time change-over, one
hour before the changing occurs,
L= announcement of a leap second, one hour before the changing
occurs.

Operating Manual GPS D25 R/G/Y 6
Page 11
Optional: MASTER output and connecting slave
analogue clocks
The MASTER output supplies the slave analogue clock with power as well as with time data.
The time data are transmitted with coded seconds pulses, in compliance with the coding
scheme of DCF77 German radio telegram. The data bits are transmitted every second, at
the change of the minute the seconds pulse will be suppressed. Screwing posts at the slave
analogue clock serve as connectors, making an easy loop-through to a next slave clock
possible.
A 9-pin DSUB female connector MASTER is mounted at the rear panel of GPS D25 R/G/Y
6. Below the pin assignment and a wiring example:
KSO
V+
V-
SIGNAL
GND
1
2
7
8
V+
V-
SIGNAL
GND
DSUB9M
open ends
(to screwing posts)
(1)
(2)
(3)
(4)
Connection of an index
clock (slave) to a master
output
Twist the V+/V- and SIGNAL/GND signals. Pins not
specified should not be used.
Example: 2-pair twisted cable.
Cable lengths:
Every slave analogue clock requires <=11mA at >=6V. To calculate the maximum cable
length, output voltage, cross section, specific resistance and number of clocks have to be
involved. For radial arrangement of copper cables with a cross section of 0,22mm² and a
output voltage of 12V, the following cable lengths are possible for every lane:
no. of clocks 1 2 5 10 20 30
length m 3500 1750 700 350 175 117
The maximum number of clocks is limited by a 300mA fuse.

Operating Manual GPS D25 R/G/Y 6
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Rear and technical data of the display
4
1
23
4
1
23
1
1
XLR4MXLR4M
SMA
DSUB9FDSUB9F
DC IN GPS
1: GND
4: V+ in
11.5-30V DC
< 2W
DC IN MAIN
1: GND
4: V+ in
11.5-17V DC
<= 800mA
GPS
Antenna
RS232
Data
1: P_SEC
2: TxD
5: GND
Option:
MASTER
1: V+ out
2: V-
7: Signal
8: GND
DC IN MAIN: Power supply for the whole unit = display + GPS receiver + MASTER
DC IN GPS: Power supply for GPS receiver
The power supply via DC IN GPS will be disconnected by a relay if the power supply at DC
IN MAIN is connected.
RS232 TxD: Data output (time, date, status), standard format = 2400/7/E/2, format
depends on internal DIP switch settings.
RS232 P_SEC: Coded seconds pulses, positive pulses, coding scheme is in compliance with
DCF77.
Dimensions: 214 (W) x 43 (H) x 140 (D) mm (½ 19”, 1U)
Weight: 1.5kg approx.
Operating temperature: 5°C to 40°C
Admiss. ambient humidity: 35% to 85%, non-condensing