[time-nuts] TrueTime GPS-TMS Specifications
Don Mimlitch
donmeis at yahoo.com
Thu Feb 16 22:33:24 EST 2006
I acquired a TrueTime GPS-TMS on eBay with no Specs and could not find a manual anywhere.
I have manage to work out the specs by tracing the Circuits and comparing it with other Truetime Systems. It seems to match the TrueTime XL-AK Time and Frequency Receiver most closely.
Here are the specs I worked up. I know several members were interested in this.
TrueTime GPS-TMS (Model 505-104)
Feb 12 2006
Summary by Don Mimlitch
donmeis at yahoo.com
The GPS-TMS is similiar to the TrueTime GPS-XL-AK Time and Frequency
Receiver (Model 600-000). The manual for the GPS-XL is available at:
http://www.symmetricom.com/support/ttm-manuals-product.aspx?pType=GPS
as of Feb 12 2006. This manual is dated Sep 17, 2001.
The GPS-XL has a Firmware version of:
TRUETIME Mk III sys ver 020 GPS-XL V1.036 182-6017v011
The GPS-TMS is probably very similiar to the TrueTime Mk III GPS-DC
Receiver, since the Firmware Version on the GPS-TMS is:
TRUETIME Mk III sys ver 13t Mark III GPS-TM 505-3000v004
However, I have not found a manual for the Mk III GPS-DC.
The GPS-TMS does not Have the Following GPS-XL Functionality:
Key Pad Operation
LCD Display
The GPS-TMS supports the Following GPS-XL Options:
1KPPS OUTPUT
SLOW CODE OUTPUT? (see F17) (may have internal Connection)
PROGRAMMABLE PULSE OUTPUT (See F26)
The GPS-TMS only supports the GPS-XL Functions Listed below.
The following GPS-XL Functions are NOT supported:
F07*, F14*, F28*, F29*, F52, F56, F68, F69, F72, F73
* These Functions are Optional on the GPS-XL
TrueTime GPS-TMS Specifications:
Firmware Version:
TRUETIME Mk III sys ver 13t Mark III GPS-TM 505-3000v004
Power Requirements:
+5V DC << 3A
+15V DC < 0.5A
-15V DC < 0.5A
9V DC Battery Backup CMOS Memory.
MAXIM MAX690EPA Microprocessor Supervisory Circuits
Dallas Semiconductor DS1210 Nonvolatile Controller Chip
Motorola MCM60L256AFC 32Kx8 Bit CMOS Static RAM
Maxim ICL7663ACPA Positive Voltage Linear Regulator (9V to 3V)
5-Pin DIN Power Connector - Female (like old PC Keyboard DIN)
Pin 1 = Ground o(Black)
Pin 4 = -15V DC o (Blue)
Pin 2 = Not Connected o
Pin 5 = +15V DC o (Orange)
Pin 3 = +5V DC o (Red)
Power Supply:POWERBOX SPU41-14E 5v -15v 15v
has a Din Plug with the proper Pin Out and works
perfectly with the GPS-TMS. (Check eBay)
OutPuts:
1 PPS 1 Pulse Per Second Square Wave (TTL)
1K PPS 1K Hz Square Wave (TTL)
IRIG-B Modulated 1K Hz Sine Wave (see IRIG-B Specs)
Currently on eBay (02/12/2006) an number of
TrueTime Odetics Air Force IRIG-B Time Display
This unit works perfectly with the GPS-TMS
PULSE OUT Program Controlled Output Pulse (See F26)
Inputs:
TRIG IN Unknown Functionality.
RS-232 Standard RS-232 DB25M Serial Port
(See Serial Port Configuration below)
ANTENNA INPUT RS485 DB15F input from some GPS Receiver Antenna
Pin 15 0V Pin 7 TL082CP Out 2nd JFET Op Amp (N/C)
Pin 14 2.7V Pin 8 DS9639A A+ input Rs422 Recv 1PPS+
Pin 13 2.7V Pin 7 DS9639A A- input Rs422 Recv 1PPS-
Pin 12 15V +15V Power Supply
Pin 11 15V +15V Power Supply
Pin 10 0V Gnd
Pin 9 0V Gnd
Pin 8 5V +5V Power Supply
Pin 7 5V Pin 5 SN75179B Y+ output Rs422 Xmit
Pin 6 0V N/C?
Pin 5 5V Pin 8 SN75179B Z- output Rs422 Xmit
Pin 4 11.5V +12V LM317 Positive Voltage Regulator
Pin 3 2.2V Pin 7 SN75179B B- input Rs422 Recv
Pin 2 2.2V Pin 8 SN75179B A+ input Rs422 Recv
Pin 1 0V Gnd
J1 Unused BNC Hole may be supported on Board.
Serial Port Configuration
There is a set of 8 Jumpers on the Antenna Board which can
be jumpered as either Open or Closed. (I'm still investigating
these jumper settings)
baud BAUD1 BAUD2 BAUD4
9600 open open open (Current Setting)
300 closed open open
600 open closed open
1200 closed closed open
2400 open open closed
4800 closed open closed
unused open closed closed
19200 closed closed closed
parity PARITY EVEN 8BITS
7even? open open open
? closed open open
? open closed open
7even? closed closed open (Current Setting)
7even? open open closed
? closed open closed
7even? open closed closed
? closed closed closed
code CODE1 CODE2 (Possibly for Flow Control?)
? open open
? closed open
? open closed
? closed closed (current Setting)
The Windows HyperTerminal should be Configured as follows:
Emulation: VT100
Port Settings
Bits per Second: (see BAUD Jumpers)
Data Bits: (see 8Bit Jumper)
Parity: (see Parity Even/Odd Jumpers)
Stop Bits: 1
Flow Control: None
Hardware (but HyperTerminal may lockup)
ASCII Setup
Echo typed characters locally
Serial Port Commands for GPS-TMS
When the unit is first turned on it will display
continuous Time once per Second (see command F08).
Enter a Ctrl-C to enter Command Mode.
function Description/Examples
F01 Time Zone Offset
F01 +00:00 (for UTC)
F01 -05:00 (for EST)
F02 12/24 Hour Format
F02 24
F02 12
F03 Time & Date
F03 UTC 02/11/06 20:06:30
Can be used to set the Real Time Clock.
F05 Time-Quality Setup
F05 ON 00000010000 00000100000 00010000000
F06 Keypad Lock?
F06 OFF
F06 ON
F08 Continuous Time Once-per-Second
(enter Ctrl-C to enter Command Mode)
Will broadcast time every second in the format
<SOH>DDD:HH:MM:SSq<CR><LF>
where
DDD - Day of Year
HH - Hour of Day
MM - Minute of Hour
SS - Second of Minute
q - Quality of Time
? - No Satellite Lock
Space - Less than Thresshold 1 (see F05)
. - Greater than Threshold 1
* - Greater than Threshold 2
# - Greater than Threshold 3
? - Greater than Threshold 4 (May only have 3 Thresholds)
F09 Time on Request
(enter "T" to get Time)
(enter Ctrl-C to enter Command Mode)
F11 Time Output Format
F13 Time Error
F13 40.000000000
F15 Exclusive Use Enable
F15 OFF
or
F15 SELF
F17 Slow Code Setup (Not sure what Output this Controls)
F17 02 04 06
F18 Software Version Request
TRUETIME Mk III sys ver 13t Mark III GPS-TM 505-3000v004
F26 Programmable Pulse Output (set Pulse for Pulse Out BNC)
F26 000:00:00:00.000 000:00:00:00.000 (Off)
F26 XXX:XX:XX:XX.000 XXX:XX:XX:XX.200 1PPS 200ms Duration
F50 Latitude Longitude Request/Set
F50 S 00d00'0.0" W 000d00'0.0" 0m pdop 0.00m
F50 N 41d11'13.0" W 073d25'52.5" 0m
F51 GPS Antenna Cable Delay
+50ns
F53 GPS Operation Mode
F53 SURVEY
F53 TIME
F53 AUTO
F55 Units of Altitude
F55 METERS
F55 FEET
F60 GPS Receiver Satellite List
F60 NONE
F65 Satellite Select
F65 SELECT ALL
F65 SELECT 02 18 13
F65 DESELECT 04 07
F66 Daylight Savings Time Mode
F66 OFF
F66 ON
F71 Oscillator Statistics
F71 offset= 0.000E+00 drift= 0.000E+00
F79 Warm Start (for Trimble SVeeSix GPS Core Module?)
----------------------------------
Dallas Semiconductor DS9639ACN Dual Dffierential Line Receiver
Maxim ICL7663ACPA Positive Voltage Linear Regulator
Texas Instruments SN75179BP Differential Driver and Receiver Pair
Texas Instruments TL082CP JFET-INPUT Operational Amplifiers
Intel P82C54-2
Motorola MC2861P
PS. I'm not sure if I can leave attachments on this board. The specs are better with the tabs etc. and I also have the TrueTime XL-AK Manual.
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