Mri - Standard Reference Input Signals - Meinberg IMS - LANTIME M3000S Manual

12.6.9 MRI - Standard Reference Input Signals

If an application requires to use external synchronization sources instead of radio/GNSS signals, an MRI card
enables the installed clock module to synchronize to 1PPS, 10 MHz, DCLS and AM time codes (IRIG B,
AFNOR, IEEE1344 or C37.118).
Each MRI card is dedicated to one clock module, if a redundant solution requires external synchronization
inputs for both clock modules, two MRI cards have to be installed. The MRI card is available with 4x BNC
connectors.
Reference Inputs: Time Code unmodulated input (DCLS)
BNC connector, isolated by opto-coupler
Insulation voltage:
Internal series resistor:
Max. input current:
Diode forward voltage:
selectable Time Code Inputs, modulated / unmodulated (DCLS):
B122/123 / B002/003 / B126/127 / B006/007
IEEE1344 (modulated and DCLS)
AFNOR NFS 87-500 (modulated and DCLS)
Time Code modulated input (AM),
BNC connector, isolated by transformer
Insulation voltage:
Input impedance:
Input signal:
10 MHz input, sine (1.5 V
or TTL, female BNC connector
PPS input, TTL, pulse length
active high, female BNC connector
Figure right:
IMS - LANTIME M3000S
3750 Vrms
330 Ohm
25 mA
1.0 V - 1.3 V
3000 V DC
50 Ohm, 600 Ohm, 5 kOhm
Internally selectable by jumper
(default 600 Ohm)
600 mV to 8 V (Mark, peak-to-peak)
- 5 V )
pp pp
5 s,
MRI - standard input signals
via BNC female connectors
Date: August 11, 2023
12 Attachment: Technical Information
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