Operating instructions

INSTALLATION
2-6
Connecting to a DC supply
If the Service Monitor is to be used from a DC voltage source it should be connected using the
supplied DC connecting lead. The polarity of the connections must be correct, RED to
POSITIVE, BLACK to NEGATIVE.
The negative connection of the DC supply is directly connected to the chassis of the Service
Monitor and therefore to all screen connections of input and output connectors. Note however,
that the AF ports are isolated under some operating conditions.
The Service Monitor will function from any supply with a voltage within the range given under
Performance data, Power requirements, in chapter 1. Note that the supply must be capable of
delivering a current in the order of 9 amps at the lowest voltage.
Ensure that the supply lead connections are sound and cannot short together.
If the DC supply powering the Service Monitor falls to a level close to the lower limit of the input
voltage range, a warning
BAT is displayed on the screen.
RF and AF connections
All RF and AF connections should made using good quality connectors correctly fitted to
appropriate cable. All connectors should be locked to the Service Monitor using the bayonet or
threaded locking rings. Do not use leads that have damaged connectors or cable as this can cause
poor performance and might damage the Service Monitor.
RF leakage levels in a test set-up can be aggravated by the use of poor quality connector leads. A
double screened lead, 1 meter in length and terminated with male BNC connectors, Part No
43137/052 and a 1 meter, 'N type' male to `N type' male, connector lead 54311/095 are both
available from Aeroflex sales offices.
WARNING
Hot Surfaces
Take care when touching the RF Input Type N connector after the application of high levels of
continuous power. If 50 W is exceeded for a prolonged period, the temperature of the connector
can become excessive.