BIRD SignalHawk SH-36S-PC, Operation Manual

Page: 51 / 137

Settings
36
Single
Performs a single sweep. Before a single sweep is triggered, the SignalHawk will
display the previous sweep. To begin a sweep, press the Manual Trigger soft
key. After the sweep finishes, it will display the results and stop sweeping.
Trigger — Sets the type of trigger that initiates a sweep. There are four types
of trigger to choose from:

Internal Continuous - Sweeps continuously and is controlled by the
SignalHawk.

Internal Single - Sweeps once when triggered. Controlled by the
SignalHawk through the Arm Trigger soft key.

External Continuous - See “External Trigger” below.

External Single - See “External Trigger” below.
Note: Useful for signals that are time varying. Ones that change
slow enough to trigger manually as well as carrier/interference
ratios. See
"Carrier-to-Interference Ratio" on page 59
.
Arm Trigger — Manually initiates a sweep.
External Trigger
External - Low Level / High Level / Rise Edge / Fall Edge /
Either Edge

Low Level - Triggers if input = 0 ± 0.5 V (TTL “Low”).

High Level - Triggers if input = 4.2 ± 0.8 V (TTL “High”).

Rise Edge - Triggers if the input goes from “Low” to “High”.

Fall Edge - Triggers if the input goes from “High” to “Low”.

Either Edge - Triggers if the input goes from either “High” to “Low” OR
“Low” to “High”.
Gate Delay
Length of wait after the trigger signal and before beginning a sweep. The range
is 100
μ s to 1 s.