From 97356cff7bb36b16babfe4ed11c64e1fa1e3b7ac Mon Sep 17 00:00:00 2001
From: Nathan Chordas-Ewell <nathan@chordasewell.com>
Date: Mon, 23 Feb 2026 02:07:08 -0500
Subject: [PATCH] Initial

---
 E8257D.m | 85 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100644 E8257D.m

diff --git a/E8257D.m b/E8257D.m
new file mode 100644
index 0000000..b235895
--- /dev/null
+++ b/E8257D.m
@@ -0,0 +1,85 @@
+classdef E8257D
+    properties
+       visaAddress;
+       v;
+    end
+    
+    methods
+        function obj = E8257D(ip_addr)
+            obj.v = visadev(['TCPIP0::' ip_addr '::inst0::INSTR']);
+            % Buffer size must precede open command
+            % set(pxa,'InputBufferSize', 640000);
+            % set(obj.v,'OutputBufferSize', 640000);
+            writeline(obj.v, '*CLS');
+            % Check to ensure the error queue is clear. Response is "+0, No Error"
+            writeline(obj.v, 'SYST:ERR?');
+            errIdentifyStart = readline(obj.v);
+            if (isvalid(obj.v) == 0)
+                obj.deInit();
+                error('Cannot instantiate Agilent E8257D');
+            end
+            obj.setModulation(0);
+        end
+
+        function rsp = sendResp(obj, cmd)
+            obj.sendCommand(cmd);
+            rsp = readline(obj.v);
+        end
+
+        function sendCommand(obj, cmd)
+            writeline(obj.v, cmd)
+        end
+
+        function reset(obj)
+            obj.sendCommand('SYST:PRES');
+        end
+
+        function waitUntilDone(obj)
+            thresh = 10000;
+            n = 0;
+            while ~str2double(obj.sendResp('*OPC?'))
+                n = n + 1;
+                if n > thresh
+                    warning('PSG timeout occured')
+                    break
+                end
+            end
+        end
+
+        function setRFPower(obj, powdBm)
+            obj.sendCommand(strcat("SOUR:POW:LEV ", num2str(powdBm), "dbm"));
+        end
+
+        function setCWFrequency(obj, freq)
+             obj.sendCommand(strcat("SOUR:FREQ:CW ", num2str(freq)));
+        end
+
+        function setOutput(obj, bool)
+            if bool
+                obj.sendCommand('OUTP:STATE 1');
+            else
+                obj.sendCommand('OUTP:STATE 0');
+            end
+        end
+
+        function setModulation(obj, bool)
+            if bool
+                obj.sendCommand('OUTP:MOD:STAT 1');
+            else
+                obj.sendCommand('OUTP:MOD:STAT 0');
+            end
+        end
+
+        function bool = deInit(obj)
+            if(isvalid(obj.v) == 1)
+                obj.reset();
+                obj.setModulation(0);
+                clear obj.v;
+                bool = 1;
+            else
+                bool = 0;
+            end
+        end
+
+    end
+end
\ No newline at end of file