B.6.3
IRIG and GPS card
G001, G002: IRIG, IRIG/GPS Card (Options, to be ordered separately)
Supports IRIG A and B or GPS time synchronization (one card per mainframe, option carrier card required)
Time and
Synchronization
Control
Disciplined
Oscilator
GPS Antenna Cable
(1-G002-2 only)
SMB to BNC Cable
1-G002-2 only
1-G001-2 or 1-G002-2
I/
O
c
on
PM
C Con
ne
c
tor
GPS
Antenna
Interface
IRIG A&B
Modulator
IRIG DLCS
Interface
GPS Antenna I/O
J1
J3
J4
J2
IRIG Modulated In
IRIG Modulated Out
IRIG DCLS I/0
Timing Signals
Figure B.25:
Block diagram IRIG/GPS card
G001, G002: IRIG
Factory installed option. Supported by IRIG and IRG/GPS option
Time Code Translator (Input)
Time Code formats
IRIG A and IRIG B, compliant with IEEE 1344
AM modulated or DC level shift (DCLS)
Modulation ratio
3:1 to 6:1
Input amplitude
500 mV to 5 V Peak
-
to
-
Peak
Input impedance
>10 kΩ
Time Code Output
Time Code format
IRIG B, compliant with IEEE 1344
Modulation ratio
3:1
Output amplitude
4 V Peak
-
to
-
Peak (fixed) into 50 Ω
DC level shift
TTL/CMOS
AM modulated input/output connectors
Two SMB sockets; one for input and one for output
DCLS connector
Micro DP, 15
-
pin; some signals linked to Interface/Controller Module internally
Time synchronization accuracy
<5 µs modulated, <1 µs (DCLS)
GEN DAQ series functions
Capture start of recording time
Synchronize master time base oscillator frequency
Time required to full synchronization after IRIG signal detected
No recording active
1 to 5 minutes
Recording or pause active
1 to 5 minutes plus 25 s per ms recording time deviation from IRIG time
User notifications while recording
Time marks on IRIG signal lost/restored and IRIG time synchronized
Long term tracking “Fly
-
wheeling”
2 ms per hour
G002: GPS
Factory installed option. Only supported by IRG/GPS option
GPS connector
Micro DP, 9
-
pin
GPS antenna
1; included
GPS antenna cable
15.25 m (50 ft); included
Time synchronization accuracy
<1 µs
GEN3t
782
I3995-3.1 en HBM: public
