Chapter 4, FRONT AND REAR PANELS
4-7
both Full Speed and Hi-Speed (USB 2.0) protocols.
4.2.05 LAN Connector
This connector allows the instrument to be connected to a 100-BaseT or 10-BaseT
network for remote control. The IP address can be set to a static value or be set to
automatic, when the instrument will accept an address allocated by a DHCP server
on the network, using the controls on the Ethernet Setting Menu - see section 5.
4.2.06 RS232 Connector
This 9-pin D type RS232 interface connector implements pins 1, 2, 3 and 7 (Earth
Ground, Transmit Data, Receive Data, Logic Ground) of a standard DTE interface.
To make a connection to a PC-compatible computer, it is normally sufficient to use a
three-wire cable connecting Transmit Data to Receive Data, Receive Data to
Transmit Data, and Logic Ground to Logic Ground. Appendix C shows the
connection diagrams of cables suitable for computers with 9-pin and 25-pin serial
connectors. Pinouts for this connector are given in appendix B.
4.2.07 AUX RS232 Connector
This connector is used to link other compatible SIGNAL RECOVERY equipment
together in a "daisy-chain" configuration. Up to an additional 15 units can be
connected in this way. Each unit must be set to a unique address (see section 5.3.17).
Pinouts for this connector are given in appendix B.
4.2.08 PRE-AMP POWER Connector
This connector supplies ±15 V at up to 100 mA and can be used for powering
optional remote preamplifiers available from SIGNAL RECOVERY. Pinouts for
this connector are given in appendix B.
4.2.09 ADC TRIG IN Connector
This connector accepts a TTL-compatible input and can be used for triggering the
digitization of the voltages present at the auxiliary analog-to-digital converters
(ADCs). The input operates on the positive edge only.
4.2.10 ADC 1, ADC 2, ADC 3 and ADC 4 Connectors
The input voltages at these connectors may be digitized using the auxiliary ADCs
and read either from the front panel or by the use of a computer command. The input
voltages are sampled and held when the ADC is triggered, and several different
trigger modes are available. These modes can be set either from the front panel or by
using a remote computer command. The input voltage range is ±10.000 V and the
resolution is 1 mV.
4.2.11 REF MON Connector
The signal at this connector is a TTL-compatible waveform synchronous with the
reference. This output monitors correct reference channel operation but its polarity is
not uniquely defined so that it does not necessarily show the correct phase
relationship with the SIG MON output.
4.2.12 TTL REF IN Connector
This connector is provided to allow TTL-compatible pulses to be used as the
reference input, if the best possible phase accuracy at low external reference
frequencies is required, when it usually gives better results than the REF IN
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