Since USB Chip has the varieties, not all the technical support and servicing can be available. Currently better support can be available for USB less than 2GB. Once your USB cannot support well, please provide related brands and models. GW Instek tries to resolve this issue in the emerging Firmware.

The GSP-830 battery pack (2 in 1 set) is adopted with Li battery system, installed in the meantime when in use. Remove the screws installed inside the GSP-830 battery pack rear panel. Install a battery pack. Firstly charge the battery pack for recommended 8 hrs (Both in Turn Off and On mode, it may take longer. On the GSP-830 Option panel, a battery can be viewed for its usage status. In general, it may take 3 to 4 hrs or so during the period while in use (Varies considerably from situations).

The 8 GSP-830 optional kit accessories, except for that Option 2 (Battery Pack) can provide customers with installation service themselves. Option 8 (GPIB interface) is available in local branch offices or signing dealers. Other optional accessories are must be Taiwan factory installed and calibrated for normal operation.

The GPIB card is installed in the way that---for Taiwan home factory, the factory-installed service is provided, for worldwide part, local branch offices or signing dealers provide installation service, a general user is unable to do so.

dB signifies power gain unit, a relative value. While calculating A power, whether it is larger than B or less than, followed by the equation 10 log(A/B)=10(logA-LogB). E.g., A power is 40dBm, B power, 43dBm. That is, A is 3dB larger than B.

dBm signifies an absolute power value unit, formula: 10log(power value/1mW). E.g., if the emission power is 1mW, in dBm the converted value is indicated in the way like: 10log(1mW/1mW)=0dBm; for 40W power, 10log(40W/1mW)=46dBm.

VSWR (Voltage Standing Wave Radio) is used to measuring wireless signal for its effective transmission power passing thru power source, transmission line to load (e.g., thru power amplifier, transmission line to antenna finally).

An ideal system has 100% energy transmission, signal source impedance, transmission line, characteristic impedance of other connectors and load impedance are accurately compatible with one another. Since there is no interference for an ideal transmission process, Signal AC voltage remains the same on both terminals. Impedance has the least possibilities of 100% compatibilities. In terms of the actual system, the impedance is impossibly 100% compatible. In this way, the power reflects against the power source partially so that causes an interference, along the transmission line, then produces a voltage Peak and wave trough.

VSWR is applicable in measure voltage variations, the ration of the highest voltage against the lowest voltage in a transmission line. As voltage remains unchanged for an ideal system, the VSWR is 1:1. Once there’s a generated reflection, voltage remains changed, VSWR amplifies—e.g., 1.2:1 or 2:1.

Calculation：

VSWR signifies the voltage ration for a transmission line, VSWR = |V(max)|/|V(min)| 

V(max) signifies the maximum signal voltage value for a transmission line, V(min), the minimum value. 

The equation is represented in the way calculating an impedance VSWR = (1+Γ)/(1-Γ)

Γ is the voltage reflection coefficient near load ends, determined by load impedance (ZL) and source impedance.：
Γ = (ZL-Zo)/(ZL+Zo), if load is completely compatible with a transmission line, Γ = 0, VSWR = 1:1.

The ATA-001 is a general purpose antenna with adjustable length. People use it in different applications with different length. It is hard to give specification for an adjustable length antenna. Actually the antenna suppliers neither offer the electrical specification because of the above reason. They only offer the dimension information.

RLB-001 is a Return Loss Bridge, primarily for return loss test (the characteristic curve under test), Source / Coupler / Load on RLB 001 each are connected with Source: TG / Coupler: RF / Load: the terminal under test. The theory states that TG signal sends thru Load terminal then returns to Coupler with amounts, such a ration, a Return Loss data.

The ADP-101 is a connector each for 75 and 50 ohm, available when a 75 ohm system accessory set is under test for the GSP, e.g., CATV signal intensity. If signal comes directly thru the GSP, there is measurement error given for test; if signal comes thru the ADP-101 and a 75 ohm system is configured in Amplitude option, there is more accurate measurement for data test.

Since the popular terminals are N, SMA and BNC in RF field, the above are the interfaces for which our company can provide. Users are specific groups (e.g., F terminal are usually for CATV, M terminal is applied in wireless radio or car antenna fields), F and M terminals are occasionally applicable though. GW Instek currently has no such equipment; please consult the sales or other channels for purchasing.

There are usually 2 expressions on various terminals: M/F or P/J. M signifies Male; F, Female; P, Plug; J, Jack. In Chinese, Female terminal and Male terminal are such, e.g., ADP-002 is SMA(J/F)-N(P/M), which means that SMA is female terminal, N, male terminal.

The GSP and ATA-002 are connected with an optional terminal while the ATA-002 antenna is optional for gauge receiving. GW Instek currently provides ADP-001 (N-BNC) to connect with both of them. It is recommended to purchase altogether with antenna, so that an antenna is unable to connect with SA.