Casio SEKU-BAND User Manual

3133501

Alarm Relay Closure

A mechanical relay is used in the AnaSat® SSPA for alarm indication. The red LED mounted on

the SSPA is illuminated whenever a problem exists and the relay has closed.

The alarm relay has normally closed contacts, so it defaults to the alarm state when power is off.

The alarm relay is accessible through the 18-pin connector mounted on the SSPA chassis. See Figure 10
for a diagram of the pins in this connector.

Monitored Values

The following analog inputs are monitored and can result in Alarm closure if out of range:

  PA temperature
  -5V DC supply (used as a bias voltage in the power amp stages)
  +5V DC supply
  PA Stage voltages
  Main +13V DC supply

The following digital inputs are monitored:

Cooling fan failure

Data Terminal Connection

Using a serial cable with a connector on one end that matches y our terminal equipment (either a

“dumb” terminal or a computer running terminal emulator or modem software), connect the 6-pin or
18-pin weathertight circular connector to the other end, following figure 10 below.

Terminal Display

The ASCII terminal display gives an accounting of SSPA alarms and status, example:

100W EC-Band SSPA REV:04 S/N:012345

TXREQ on | TX ON AIR

ALARM:CLEAR

TXG 50.0 TXout 47

TXpk 48

TEMP: 13C FANERR:clear P12V:13.4 P11V:PA12 P5V: 5.0 N5V:-5.4

PA 1: 0.0 PA 2: 0.0 PA 3: 0.0 PA 4: 0.0 PA 5: 0.0 PA 6:13.0

• The top line shows the SSPA model and serial number.

• The second line gives the only changeable operating parameter: ON or OFF. This can be

set using the TX command: example TX ON, TX OFF.

AnaSat

SSPA