M88 Evaluation Kit User Guide
Back side connectors
STO-DEV7227-HB Rev. 2.1
11
8
Back side connectors
Figure 4. M88 Evaluation Kit back side connector placement.
Name
Type
Description
5V DC
DC jack 5.5/2.5 mm
5V power supply, center plus. Current needed depends on
add-on boards.
IN5
SMA female
Frequency input, single ended.
IN4
SMA female
Frequency input, single ended.
IN3 +/-
SMA female
Frequency input, configurable as differential or single ended.
Use + for single ended.
IN2 +/-
SMA female
Frequency input, configurable as differential or single ended.
Use + for single ended.
IN1 +/-
SMA female
Frequency input, configurable as differential or single ended.
Use + for single ended.
REF
SMA female
External reference frequency, e.g. for external oscillator.
Console
Micro USB
Console port for serial communication with M88 (COM3).
Port 2
RJ45 with integrated LED
and SFP slot
Secondary Gigabit Ethernet. Use either RJ45 or SFP.
ToD/1PPS
IN
RJ45
ToD and 1 PPS according to G.703 V.11. Alternate external
time source.
1PPS IN
SMA female
1PPS input for synchronization to an alternate external time
source, LVTTL
Table 2. M88 Evaluation Kit back side connector description.
Port 2
ToD/
1PPS
IN
5V
DC
