## Putting the Instrument into Operation

This section describes the basic steps to be taken when setting up the analyzer for the first time.

1. Unpacking
   the instrument

2. Setting up the instrument on a benchtop
   or in a rack

3. Connecting to the AC power supply

4. Switching on

| Attention! Before turning on the instrument, please make sure that the following conditions are fulfilled: Instrument covers are in place and all fasteners are tightened. Fan openings are free from obstructions. Signal levels at the input connectors are all within the specified maxima. Signal outputs are correctly connected and not overloaded. The instrument is dry and shows no condensation. Non-observance may cause damage to the instrument!

### Unpacking the Instrument and Checking the Shipment

1. Unpack the instrument and the other contents of the shipping container.

2. Check the shipment against the list of accessories to ensure that all items are included.

3. Remove the two protective caps from the front and rear and carefully inspect the analyzer to make sure that it was not damaged during shipment.

Should the instrument be damaged, immediately notify the forwarder who shipped the instrument to you and keep the container and packing material.

Equipment returned or sent in for repair
must be packed in the original container or packing with electrostatic protection. It is recommended to keep at least the two protective caps for front and rear side in order to prevent damage to the controls and connectors.

### Instrument Setup

The network analyzer is designed for use under laboratory conditions, either on a bench top or in a rack. The general ambient conditions required at the operating site are as follows:

- The ambient temperature must be in the ranges specified for operation and for compliance with specifications (see data sheet).

- All fan openings including the rear panel perforations must be unobstructed. The distance to the wall should be at least 10 cm.

| Attention! To avoid damage of electronic components of the DUT and the analyzer, the operating site must be protected against electrostatic discharge (ESD). ESD is most likely to occur when you connect or disconnect a DUT or test fixture to the analyzer's test ports. To prevent ESD damage use the wrist strap and grounding cord supplied with the instrument and connect yourself to the GND connector at the front panel.

#### Bench Top Operation

If the analyzer is operated on a bench top, the surface should be flat.

The instrument can be used in horizontal position, standing on its feet, or with the support feet on the bottom extended.

| Caution! The feet must be fully folded in or out. Only in this way can the stability of analyzer be guaranteed and reliable operation be ensured. The total weight on the extended feet (including the analyzer's weight and other units placed on top) must not exceed 500 N. The units must be secured against slipping (e.g. by locking the feet at the upper front frame). When moving the unit with expanded feet, the feet might collapse and fold in. To avoid injuries, the unit must therefore not be moved with the feet out.

### Mounting in a 19" Rack

Using the adapter ZZA-611 (order number 1096.3302.00) the instrument can be mounted in 19" racks according to the mounting instructions supplied with the rack adapter.

| Attention! Allow for sufficient air supply in the rack. Make sure that there is sufficient space between the ventilation holes and the rack casing.

### EMI Protective Measures

In order to avoid electromagnetic interference, the instrument may only be operated when it is closed and with all shielding covers fitted. Only appropriate shielded signal and control cables may be used.

### Connecting the Instrument to the AC Supply

The network analyzer is automatically adapted to the AC supply voltage supplied. The supply voltage must be in the range 100 V to 240 V; 50 Hz to 60 Hz. The mains connector
is located at the bottom left corner of the rear panel.

- Connect the network analyzer to the AC power source using the AC power cable delivered with the instrument.

The maximum power consumption of the analyzer is 450 W. The typical power consumption and the frequency range is listed in the data sheet.

The network analyzer is protected by two fuses as specified on the label on the power supply. The fuses are located on an AC Fuse Board (order no. 1145.3906.02) which must be replaced to change the fuses. Replacing the AC Fuse Board requires opening the instrument and is described in the service manual.

### Power on and off

The mains connector is located at the bottom left corner of the rear panel.

- To turn the power on or off, press the AC power switch to position I (On) or 0 (Off).

After power-on, the analyzer is in standby or ready
state, depending on the state of the STANDBY toggle switch at the front panel of the instrument when the instrument was switched off for the last time.

The AC power switch can be permanently on. Switching off is required only if the instrument must be completely removed from the AC power supply.

### Standby and Ready State

The STANDBY toggle switch is located in the bottom left corner of the front panel.

- After switching on the AC power
  , press the STANDBY key briefly to switch the analyzer from the standby to ready state or vice versa.

- In standby state, the right, amber LED is on. The standby power only supplies the power switch circuits and the optional oven quartz (OCXO, 10 MHz reference oscillator, option ZVAB-B4, order no. 1164.1757.02). In this state it is safe to switch off the AC power and disconnect the instrument from the power supply.

- In ready state, the left, green LED is on. The analyzer is ready for operation. All modules are power-supplied and the analyzer initiates its startup procedure
  .

| Caution! The instrument is still power-supplied while it is in standby mode.

### Replacing Fuses

The DC inputs PORT BIAS
at the rear panel are each protected by a fuse IEC 127 - F 250 L (250 mA flink).

- To replace the fuses open the fuse holder by slightly turning the lid counterclockwise.