© Norsat International Inc.
(“Norsat”) All Rights Reserved
2021-09-02 052910 Rev E
11
Table 2-1
summarizes the various pinout for the 20-40-80W ATOM Ku GaN.
Table 2-1: J2 Pinouts for ATOM Configurations
Connector
Pin
Standard
Configuration
Connector
Pin
Standard
Configuration
A
RS-485 Rx-
F
RS-232 Rx
B
RS-485 Rx+
G
GND
C
RS-485 Tx+
H
Open
D
Mute
J
RS-485 Tx-
E
RS-232 Tx
K
Open
Ground Pin(s): Pin G
Ground/shield for Ethernet, RS-485, RS-232 & Mute signals. This is internally connected to the case
ground. Do not exceed 100mA.
Mute Control: Pin D
This pin controls the hardware mute state of the ATOM. When muted, the power transistors are turned off,
reducing power consumption and providing an RF output noise close to the thermal noise floor.
The operation of this pin is fully configurable through the M&C Interface. Pin D can be biased with either
an internal Pull-Down (to 0V) or an internal Pull-Up (to 4V). Pin D is also configurable to be either active
high (3-5V on Pin D will mute the unit) or active low (0-0.8V on Pin D will mute the unit). All voltages are
relative to Pin G or the Case Ground.
Because of the configurable pull-down / pull-up resistor, the unit can be configured to be active (i.e. not
muted) when Pin D is left floating. Therefore, it is possible to operate the unit with no connection pin D.
The ATOM mute control behavior is shown below in
Table 2-2
. Note that the ATOM may be factory ordered
with alternate configurations, so the Default configuration shown in the table is not reflective of all ATOM
units.
Table 2-2: ATOM Mute Control Behavior
Configuration
Mute Line
Polarity
Mute Line
Bias
Sample
Input 1
Sample Mute
State 1
Sample
Input 2
Sample Mute
State 2
Sample
Input 3
Sample Mute
State 3
Default
0V = Unmute
Pull-Down
0V
Unmuted
5V
Muted
Floating
Unmuted
Sample 1
0V = Unmute
Pull-Up
0V
Unmuted
5V
Muted
Floating
Muted
Sample 2
5V = Unmute
Pull-Down
0V
Muted
5V
Unmuted
Floating
Muted
Sample 3
5V = Unmute
Pull-Up
0V
Muted
5V
Unmuted
Floating
Unmuted
Note that the ATOM mute state can also be controlled through the M&C interface. The software
mute setting takes priority over the hardware pin. Refer to
for details.
