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The HP 3326A is a synthesizer designed for various applications, offering a range of features for installation, operation, and maintenance. This manual provides comprehensive instructions for setting up the device, understanding its environmental requirements, and ensuring proper interfacing with other systems.
The HP 3326A Synthesizer is a precision instrument capable of generating various signals. It is designed to be integrated into larger systems, particularly those utilizing the Hewlett-Packard Interface Bus (HP-IB). The device's core function revolves around signal synthesis, making it suitable for applications requiring accurate and stable frequency generation. It can operate from a single-phase AC power source, supporting multiple voltage ranges (100 V, 120 V, 220 V, or 240 V) and a frequency range of 48 to 66 Hz. The power consumption is relatively low, less than 200 VA when active and less than 15 VA in standby mode, indicating efficient power usage.
The HP 3326A is equipped with a thermal cutout switch that automatically puts the instrument into standby mode if the internal temperature becomes excessive. This safety feature prevents damage due to overheating, with the switch resetting automatically once the device cools down. The thermal cutout threshold is dependent on line voltage and airflow, ensuring protection under varying operating conditions.
For system integration, the HP 3326A is fully compatible with the HP-IB, which is Hewlett-Packard's implementation of IEEE Standard 488-1978 and ANSI Standard MC 1.1. This allows the synthesizer to be controlled and monitored by a central controller within a system of up to 15 HP-IB compatible instruments. The HP-IB interface uses piggy-back connectors, enabling multiple cables to be connected to a single source without requiring special adapters. The device utilizes all available HP-IB lines, emphasizing the importance of proper cable connections to avoid adverse effects on operation.
The HP 3326A is designed for both portable bench use and rack mounting. For bench use, it comes with plastic feet that facilitate self-alignment when stacked with other full-width modular instruments. These feet also ensure adequate air circulation across the top and bottom cabinet surfaces. A front handle kit is available as an accessory to enhance portability and ease of handling.
For integration into equipment cabinets, the HP 3326A can be rack-mounted using specific flange kits. Option 908 provides a Rack Mount Flange Kit, while Option 909 offers a Rack Mount Flange Kit with Handles. The rack mount conforms to the EIA standard width of 482.6 mm (19 inches). When rack mounting, it is crucial to remove the plastic trim and feet, and then install the appropriate flange kit. The manual explicitly warns about the instrument's weight (approximately 27 kg or 60 lbs) and stresses the importance of using instrument support rails within the cabinet to bear the weight, rather than relying solely on the front flanges, to prevent personal injury and damage.
The line voltage selection is a critical setup feature. The device is factory-set to the most common line voltage of its destination country. Users can easily change the line voltage and fuse by following a clear procedure involving removing the power cord, prying open the power selector cover, and adjusting the cylindrical line voltage selector and fuse. The manual provides a table of selector voltages and corresponding voltage ranges, along with fuse types and HP part numbers for 110 V/120 V and 220 V/240 V settings. A caution is included to remove the line voltage selector before rotating it to prevent damage to the module.
The HP 3326A's HP-IB address is stored in nonvolatile memory and can be set between 0 and 30. The factory default address is 18. To view or change the address, users press the blue SHIFT key followed by the LOCAL key in the HP-IB STATUS block, then enter the desired address using the numeric keypad. The system provides feedback, displaying "Error 20 RNGE" if an address exceeding 30 is entered.
Regular maintenance is essential for the HP 3326A's longevity and reliable operation. The instrument is equipped with a cooling fan on the rear panel, and proper air circulation is vital. It requires at least 75 mm (3 inches) of clearance at the rear and 25 mm (1 inch) on each side to prevent excessive internal temperatures, which could reduce reliability. The cooling fan has a filter that can be removed for cleaning. The filter is secured by four knurled nuts and should be cleaned by flushing with soapy water every thirty days.
The manual also provides detailed instructions for storage and shipment. The HP 3326A should be stored in a clean, dry environment, protected from temperatures or temperature changes that could cause condensation. Environmental limitations for storage and shipment include temperatures from -40°C to +75°C, humidity up to 95%, and altitudes up to 15,300 meters (50,000 feet).
For repacking, general instructions include wrapping the instrument in heavy paper or anti-static plastic, using a strong double-wall carton (350-pound test material is adequate), and surrounding the device with 70 to 100 mm (3 to 4 inches) of shock-absorbing material to prevent movement. A critical caution advises against using styrene pellets as packing material, as they do not provide adequate cushioning, allow the instrument to shift, and can generate static electricity that may damage electronic components. When returning the instrument for service, users are instructed to attach a tag with service requirements, return address, model number, and full serial number, and to mark the container "FRAGILE" for careful handling.
General| Modulation Types | AM, FM, PM |
|---|---|
| Interface | GPIB (IEEE-488) |
| Amplitude Accuracy | ±1 dB |
| Time Base Accuracy | ±1 ppm |
| Output Impedance | 50 Ω |
| Waveforms | Sine, Square, Triangle |
| Dimensions | 425 mm x 132 mm x 400 mm |
| Weight | 15 kg |
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