Spirent DLS 400E3, Operating Manual

Page: 45 / 64

DLS 400E3 Operating Manual
Spirent Communications - Page 6-5
7104000537 03/04 -2
:SET:SLOT 20,0 M,INLINE
:SET:SLOT 21,0 M,TAP
:SET:SLOT 22,0 M,INLINE
:SET:SLOT 23,500 M,INLINE
:SET:SLOT 24,0 M,INLINE
These commands are used to build a loop by setting the simulated length and loop connection of slot 1
through 24, with the exclusion of slot 10. Slot 10 has special functions and can not be used to build the loop.
The loop connection selects whether the wireline is connected normally, or as a bridged tap.
:setting:slot <Slot Number> , <Length> , <Connection>
where
<Slot Number> Range: 1 through 9, 11 through 24
<Length> Range:
(metric types) 0 to 500 m in 50 m steps
(AWG types) 0 to 1500 ft in 50 ft steps
<Connection> Choices: TAP,INLINE
The units of the length are optional, but they must be "m" or "ft".
The query of a slot of a DLS 400E3 chassis returns the length, connection type (inline or tap) and also the
wireline type. This information is very useful to automatically determine the architecture of the simulator.
The wireline cards types are 0.32, 0.4, 0.5, 0.63 and 0.9 mm gauge with a fine increment wireline cards
allowing a minimum of 15 meter increments.
A "Bypass Card" type is returned for any other slot not occupied by a wireline
The type "Empty Slot" is returned if no card (wireline or bypass) is installed in a particular slot.
The type "Unknown Card" is returned if the controller firmware does not support a new type of wireline.
Please contact the Customer Service department for details on how to upgrade the firmware (see “Customer
Support” section for contact information).
All slots must have a wireline card or bypass card to ensure continuity of the signal throughout the simulator.
For information about compensation, see Chapter 5 "DLS 400E3 LOOP DESCRIPTIONS FOR REMOTE
CONTROL".
6.2.1 Example using the IEEE 488 Interface
The DLS 400E3 is sa lot -based configuration. To set a specific slot, do the following:
1) transmit “:SET:SLOT 1, 50 METERS,INLINE”
2) check that the REMOTE LED is green
To send and receive messages with error checking follow these steps:
1) set all relevant enable bits (only done once)
2) send the message
3) wait for SRQ
4) read
the Status Byte
5) if MAV (bit 4) is set then read the response
6) if ESB (bit 5) is set then read the Standard Event Status Register and take all the relevant actions.
For example, to get the identification message with the IEEE 488 interface, do the following: